21187920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{6791}}^1$

素因数の和:6820

約数の個数: 80

約数和(自身を含む): 70745472

約数和(自身を除く): 49557552

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 65, 78, 80, 104, 120, 130, 156, 195, 208, 240, 260, 312, 390, 520, 624, 780, 1040, 1560, 3120, 6791, 13582, 20373, 27164, 33955, 40746, 54328, 67910, 81492, 88283, 101865, 108656, 135820, 162984, 176566, 203730, 264849, 271640, 325968, 353132, 407460, 441415, 529698, 543280, 706264, 814920, 882830, 1059396, 1324245, 1412528, 1629840, 1765660, 2118792, 2648490, 3531320, 4237584, 5296980, 7062640, 10593960, 21187920]

約数ペア:

[(1, 21187920), (2, 10593960), (3, 7062640), (4, 5296980), (5, 4237584), (6, 3531320), (8, 2648490), (10, 2118792), (12, 1765660), (13, 1629840), (15, 1412528), (16, 1324245), (20, 1059396), (24, 882830), (26, 814920), (30, 706264), (39, 543280), (40, 529698), (48, 441415), (52, 407460), (60, 353132), (65, 325968), (78, 271640), (80, 264849), (104, 203730), (120, 176566), (130, 162984), (156, 135820), (195, 108656), (208, 101865), (240, 88283), (260, 81492), (312, 67910), (390, 54328), (520, 40746), (624, 33955), (780, 27164), (1040, 20373), (1560, 13582), (3120, 6791)]