20213680

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{167}}^1$

素因数の和:286

約数の個数: 80

約数和(自身を含む): 50621760

約数和(自身を除く): 30408080

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 89, 136, 167, 170, 178, 272, 334, 340, 356, 445, 668, 680, 712, 835, 890, 1336, 1360, 1424, 1513, 1670, 1780, 2672, 2839, 3026, 3340, 3560, 5678, 6052, 6680, 7120, 7565, 11356, 12104, 13360, 14195, 14863, 15130, 22712, 24208, 28390, 29726, 30260, 45424, 56780, 59452, 60520, 74315, 113560, 118904, 121040, 148630, 227120, 237808, 252671, 297260, 505342, 594520, 1010684, 1189040, 1263355, 2021368, 2526710, 4042736, 5053420, 10106840, 20213680]

約数ペア:

[(1, 20213680), (2, 10106840), (4, 5053420), (5, 4042736), (8, 2526710), (10, 2021368), (16, 1263355), (17, 1189040), (20, 1010684), (34, 594520), (40, 505342), (68, 297260), (80, 252671), (85, 237808), (89, 227120), (136, 148630), (167, 121040), (170, 118904), (178, 113560), (272, 74315), (334, 60520), (340, 59452), (356, 56780), (445, 45424), (668, 30260), (680, 29726), (712, 28390), (835, 24208), (890, 22712), (1336, 15130), (1360, 14863), (1424, 14195), (1513, 13360), (1670, 12104), (1780, 11356), (2672, 7565), (2839, 7120), (3026, 6680), (3340, 6052), (3560, 5678)]