21423220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{149}}^1$

素因数の和:257

約数の個数: 96

約数和(自身を含む): 56448000

約数和(自身を除く): 35024780

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 79, 91, 130, 140, 149, 158, 182, 260, 298, 316, 364, 395, 455, 553, 596, 745, 790, 910, 1027, 1043, 1106, 1490, 1580, 1820, 1937, 2054, 2086, 2212, 2765, 2980, 3874, 4108, 4172, 5135, 5215, 5530, 7189, 7748, 9685, 10270, 10430, 11060, 11771, 13559, 14378, 19370, 20540, 20860, 23542, 27118, 28756, 35945, 38740, 47084, 54236, 58855, 67795, 71890, 82397, 117710, 135590, 143780, 153023, 164794, 235420, 271180, 306046, 329588, 411985, 612092, 765115, 823970, 1071161, 1530230, 1647940, 2142322, 3060460, 4284644, 5355805, 10711610, 21423220]

約数ペア:

[(1, 21423220), (2, 10711610), (4, 5355805), (5, 4284644), (7, 3060460), (10, 2142322), (13, 1647940), (14, 1530230), (20, 1071161), (26, 823970), (28, 765115), (35, 612092), (52, 411985), (65, 329588), (70, 306046), (79, 271180), (91, 235420), (130, 164794), (140, 153023), (149, 143780), (158, 135590), (182, 117710), (260, 82397), (298, 71890), (316, 67795), (364, 58855), (395, 54236), (455, 47084), (553, 38740), (596, 35945), (745, 28756), (790, 27118), (910, 23542), (1027, 20860), (1043, 20540), (1106, 19370), (1490, 14378), (1580, 13559), (1820, 11771), (1937, 11060), (2054, 10430), (2086, 10270), (2212, 9685), (2765, 7748), (2980, 7189), (3874, 5530), (4108, 5215), (4172, 5135)]