21537560

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1579}}^1$

素因数の和:1632

約数の個数: 64

約数和(自身を含む): 54604800

約数和(自身を除く): 33067240

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 31, 40, 44, 55, 62, 88, 110, 124, 155, 220, 248, 310, 341, 440, 620, 682, 1240, 1364, 1579, 1705, 2728, 3158, 3410, 6316, 6820, 7895, 12632, 13640, 15790, 17369, 31580, 34738, 48949, 63160, 69476, 86845, 97898, 138952, 173690, 195796, 244745, 347380, 391592, 489490, 538439, 694760, 978980, 1076878, 1957960, 2153756, 2692195, 4307512, 5384390, 10768780, 21537560]

約数ペア:

[(1, 21537560), (2, 10768780), (4, 5384390), (5, 4307512), (8, 2692195), (10, 2153756), (11, 1957960), (20, 1076878), (22, 978980), (31, 694760), (40, 538439), (44, 489490), (55, 391592), (62, 347380), (88, 244745), (110, 195796), (124, 173690), (155, 138952), (220, 97898), (248, 86845), (310, 69476), (341, 63160), (440, 48949), (620, 34738), (682, 31580), (1240, 17369), (1364, 15790), (1579, 13640), (1705, 12632), (2728, 7895), (3158, 6820), (3410, 6316)]