21582440

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{271}}^1$

素因数の和:474

約数の個数: 64

約数和(自身を含む): 53464320

約数和(自身を除く): 31881880

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 181, 220, 271, 362, 440, 542, 724, 905, 1084, 1355, 1448, 1810, 1991, 2168, 2710, 2981, 3620, 3982, 5420, 5962, 7240, 7964, 9955, 10840, 11924, 14905, 15928, 19910, 23848, 29810, 39820, 49051, 59620, 79640, 98102, 119240, 196204, 245255, 392408, 490510, 539561, 981020, 1079122, 1962040, 2158244, 2697805, 4316488, 5395610, 10791220, 21582440]

約数ペア:

[(1, 21582440), (2, 10791220), (4, 5395610), (5, 4316488), (8, 2697805), (10, 2158244), (11, 1962040), (20, 1079122), (22, 981020), (40, 539561), (44, 490510), (55, 392408), (88, 245255), (110, 196204), (181, 119240), (220, 98102), (271, 79640), (362, 59620), (440, 49051), (542, 39820), (724, 29810), (905, 23848), (1084, 19910), (1355, 15928), (1448, 14905), (1810, 11924), (1991, 10840), (2168, 9955), (2710, 7964), (2981, 7240), (3620, 5962), (3982, 5420)]