21610720

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4357}}^1$

素因数の和:4403

約数の個数: 48

約数和(自身を含む): 52714368

約数和(自身を除く): 31103648

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4357, 4960, 8714, 17428, 21785, 34856, 43570, 69712, 87140, 135067, 139424, 174280, 270134, 348560, 540268, 675335, 697120, 1080536, 1350670, 2161072, 2701340, 4322144, 5402680, 10805360, 21610720]

約数ペア:

[(1, 21610720), (2, 10805360), (4, 5402680), (5, 4322144), (8, 2701340), (10, 2161072), (16, 1350670), (20, 1080536), (31, 697120), (32, 675335), (40, 540268), (62, 348560), (80, 270134), (124, 174280), (155, 139424), (160, 135067), (248, 87140), (310, 69712), (496, 43570), (620, 34856), (992, 21785), (1240, 17428), (2480, 8714), (4357, 4960)]