20181420

素因数分解:

$2^2\times 3^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{281}}^1$

素因数の和:325

約数の個数: 192

約数和(自身を含む): 75801600

約数和(自身を除く): 55620180

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 19, 20, 21, 27, 28, 30, 35, 36, 38, 42, 45, 54, 57, 60, 63, 70, 76, 84, 90, 95, 105, 108, 114, 126, 133, 135, 140, 171, 180, 189, 190, 210, 228, 252, 266, 270, 281, 285, 315, 342, 378, 380, 399, 420, 513, 532, 540, 562, 570, 630, 665, 684, 756, 798, 843, 855, 945, 1026, 1124, 1140, 1197, 1260, 1330, 1405, 1596, 1686, 1710, 1890, 1967, 1995, 2052, 2394, 2529, 2565, 2660, 2810, 3372, 3420, 3591, 3780, 3934, 3990, 4215, 4788, 5058, 5130, 5339, 5620, 5901, 5985, 7182, 7587, 7868, 7980, 8430, 9835, 10116, 10260, 10678, 11802, 11970, 12645, 14364, 15174, 16017, 16860, 17703, 17955, 19670, 21356, 23604, 23940, 25290, 26695, 29505, 30348, 32034, 35406, 35910, 37373, 37935, 39340, 48051, 50580, 53109, 53390, 59010, 64068, 70812, 71820, 74746, 75870, 80085, 88515, 96102, 106218, 106780, 112119, 118020, 144153, 149492, 151740, 160170, 177030, 186865, 192204, 212436, 224238, 240255, 265545, 288306, 320340, 336357, 354060, 373730, 448476, 480510, 531090, 560595, 576612, 672714, 720765, 747460, 961020, 1009071, 1062180, 1121190, 1345428, 1441530, 1681785, 2018142, 2242380, 2883060, 3363570, 4036284, 5045355, 6727140, 10090710, 20181420]

約数ペア:

[(1, 20181420), (2, 10090710), (3, 6727140), (4, 5045355), (5, 4036284), (6, 3363570), (7, 2883060), (9, 2242380), (10, 2018142), (12, 1681785), (14, 1441530), (15, 1345428), (18, 1121190), (19, 1062180), (20, 1009071), (21, 961020), (27, 747460), (28, 720765), (30, 672714), (35, 576612), (36, 560595), (38, 531090), (42, 480510), (45, 448476), (54, 373730), (57, 354060), (60, 336357), (63, 320340), (70, 288306), (76, 265545), (84, 240255), (90, 224238), (95, 212436), (105, 192204), (108, 186865), (114, 177030), (126, 160170), (133, 151740), (135, 149492), (140, 144153), (171, 118020), (180, 112119), (189, 106780), (190, 106218), (210, 96102), (228, 88515), (252, 80085), (266, 75870), (270, 74746), (281, 71820), (285, 70812), (315, 64068), (342, 59010), (378, 53390), (380, 53109), (399, 50580), (420, 48051), (513, 39340), (532, 37935), (540, 37373), (562, 35910), (570, 35406), (630, 32034), (665, 30348), (684, 29505), (756, 26695), (798, 25290), (843, 23940), (855, 23604), (945, 21356), (1026, 19670), (1124, 17955), (1140, 17703), (1197, 16860), (1260, 16017), (1330, 15174), (1405, 14364), (1596, 12645), (1686, 11970), (1710, 11802), (1890, 10678), (1967, 10260), (1995, 10116), (2052, 9835), (2394, 8430), (2529, 7980), (2565, 7868), (2660, 7587), (2810, 7182), (3372, 5985), (3420, 5901), (3591, 5620), (3780, 5339), (3934, 5130), (3990, 5058), (4215, 4788)]