21698040

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1987}}^1$

素因数の和:2021

約数の個数: 128

約数和(自身を含む): 80156160

約数和(自身を除く): 58458120

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 20, 21, 24, 26, 28, 30, 35, 39, 40, 42, 52, 56, 60, 65, 70, 78, 84, 91, 104, 105, 120, 130, 140, 156, 168, 182, 195, 210, 260, 273, 280, 312, 364, 390, 420, 455, 520, 546, 728, 780, 840, 910, 1092, 1365, 1560, 1820, 1987, 2184, 2730, 3640, 3974, 5460, 5961, 7948, 9935, 10920, 11922, 13909, 15896, 19870, 23844, 25831, 27818, 29805, 39740, 41727, 47688, 51662, 55636, 59610, 69545, 77493, 79480, 83454, 103324, 111272, 119220, 129155, 139090, 154986, 166908, 180817, 206648, 208635, 238440, 258310, 278180, 309972, 333816, 361634, 387465, 417270, 516620, 542451, 556360, 619944, 723268, 774930, 834540, 904085, 1033240, 1084902, 1446536, 1549860, 1669080, 1808170, 2169804, 2712255, 3099720, 3616340, 4339608, 5424510, 7232680, 10849020, 21698040]

約数ペア:

[(1, 21698040), (2, 10849020), (3, 7232680), (4, 5424510), (5, 4339608), (6, 3616340), (7, 3099720), (8, 2712255), (10, 2169804), (12, 1808170), (13, 1669080), (14, 1549860), (15, 1446536), (20, 1084902), (21, 1033240), (24, 904085), (26, 834540), (28, 774930), (30, 723268), (35, 619944), (39, 556360), (40, 542451), (42, 516620), (52, 417270), (56, 387465), (60, 361634), (65, 333816), (70, 309972), (78, 278180), (84, 258310), (91, 238440), (104, 208635), (105, 206648), (120, 180817), (130, 166908), (140, 154986), (156, 139090), (168, 129155), (182, 119220), (195, 111272), (210, 103324), (260, 83454), (273, 79480), (280, 77493), (312, 69545), (364, 59610), (390, 55636), (420, 51662), (455, 47688), (520, 41727), (546, 39740), (728, 29805), (780, 27818), (840, 25831), (910, 23844), (1092, 19870), (1365, 15896), (1560, 13909), (1820, 11922), (1987, 10920), (2184, 9935), (2730, 7948), (3640, 5961), (3974, 5460)]