21871920

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{277}}^1$

素因数の和:347

約数の個数: 160

約数和(自身を含む): 79423488

約数和(自身を除く): 57551568

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 47, 48, 56, 60, 70, 80, 84, 94, 105, 112, 120, 140, 141, 168, 188, 210, 235, 240, 277, 280, 282, 329, 336, 376, 420, 470, 554, 560, 564, 658, 705, 752, 831, 840, 940, 987, 1108, 1128, 1316, 1385, 1410, 1645, 1662, 1680, 1880, 1939, 1974, 2216, 2256, 2632, 2770, 2820, 3290, 3324, 3760, 3878, 3948, 4155, 4432, 4935, 5264, 5540, 5640, 5817, 6580, 6648, 7756, 7896, 8310, 9695, 9870, 11080, 11280, 11634, 13019, 13160, 13296, 15512, 15792, 16620, 19390, 19740, 22160, 23268, 26038, 26320, 29085, 31024, 33240, 38780, 39057, 39480, 46536, 52076, 58170, 65095, 66480, 77560, 78114, 78960, 91133, 93072, 104152, 116340, 130190, 155120, 156228, 182266, 195285, 208304, 232680, 260380, 273399, 312456, 364532, 390570, 455665, 465360, 520760, 546798, 624912, 729064, 781140, 911330, 1041520, 1093596, 1366995, 1458128, 1562280, 1822660, 2187192, 2733990, 3124560, 3645320, 4374384, 5467980, 7290640, 10935960, 21871920]

約数ペア:

[(1, 21871920), (2, 10935960), (3, 7290640), (4, 5467980), (5, 4374384), (6, 3645320), (7, 3124560), (8, 2733990), (10, 2187192), (12, 1822660), (14, 1562280), (15, 1458128), (16, 1366995), (20, 1093596), (21, 1041520), (24, 911330), (28, 781140), (30, 729064), (35, 624912), (40, 546798), (42, 520760), (47, 465360), (48, 455665), (56, 390570), (60, 364532), (70, 312456), (80, 273399), (84, 260380), (94, 232680), (105, 208304), (112, 195285), (120, 182266), (140, 156228), (141, 155120), (168, 130190), (188, 116340), (210, 104152), (235, 93072), (240, 91133), (277, 78960), (280, 78114), (282, 77560), (329, 66480), (336, 65095), (376, 58170), (420, 52076), (470, 46536), (554, 39480), (560, 39057), (564, 38780), (658, 33240), (705, 31024), (752, 29085), (831, 26320), (840, 26038), (940, 23268), (987, 22160), (1108, 19740), (1128, 19390), (1316, 16620), (1385, 15792), (1410, 15512), (1645, 13296), (1662, 13160), (1680, 13019), (1880, 11634), (1939, 11280), (1974, 11080), (2216, 9870), (2256, 9695), (2632, 8310), (2770, 7896), (2820, 7756), (3290, 6648), (3324, 6580), (3760, 5817), (3878, 5640), (3948, 5540), (4155, 5264), (4432, 4935)]