21660320

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{397}}^1$

素因数の和:454

約数の個数: 96

約数和(自身を含む): 57770496

約数和(自身を除く): 36110176

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 31, 32, 40, 44, 55, 62, 80, 88, 110, 124, 155, 160, 176, 220, 248, 310, 341, 352, 397, 440, 496, 620, 682, 794, 880, 992, 1240, 1364, 1588, 1705, 1760, 1985, 2480, 2728, 3176, 3410, 3970, 4367, 4960, 5456, 6352, 6820, 7940, 8734, 10912, 12307, 12704, 13640, 15880, 17468, 21835, 24614, 27280, 31760, 34936, 43670, 49228, 54560, 61535, 63520, 69872, 87340, 98456, 123070, 135377, 139744, 174680, 196912, 246140, 270754, 349360, 393824, 492280, 541508, 676885, 698720, 984560, 1083016, 1353770, 1969120, 2166032, 2707540, 4332064, 5415080, 10830160, 21660320]

約数ペア:

[(1, 21660320), (2, 10830160), (4, 5415080), (5, 4332064), (8, 2707540), (10, 2166032), (11, 1969120), (16, 1353770), (20, 1083016), (22, 984560), (31, 698720), (32, 676885), (40, 541508), (44, 492280), (55, 393824), (62, 349360), (80, 270754), (88, 246140), (110, 196912), (124, 174680), (155, 139744), (160, 135377), (176, 123070), (220, 98456), (248, 87340), (310, 69872), (341, 63520), (352, 61535), (397, 54560), (440, 49228), (496, 43670), (620, 34936), (682, 31760), (794, 27280), (880, 24614), (992, 21835), (1240, 17468), (1364, 15880), (1588, 13640), (1705, 12704), (1760, 12307), (1985, 10912), (2480, 8734), (2728, 7940), (3176, 6820), (3410, 6352), (3970, 5456), (4367, 4960)]