21485420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{1601}}^1$

素因数の和:1682

約数の個数: 48

約数和(自身を含む): 50059296

約数和(自身を除く): 28573876

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 61, 110, 122, 220, 244, 305, 610, 671, 1220, 1342, 1601, 2684, 3202, 3355, 6404, 6710, 8005, 13420, 16010, 17611, 32020, 35222, 70444, 88055, 97661, 176110, 195322, 352220, 390644, 488305, 976610, 1074271, 1953220, 2148542, 4297084, 5371355, 10742710, 21485420]

約数ペア:

[(1, 21485420), (2, 10742710), (4, 5371355), (5, 4297084), (10, 2148542), (11, 1953220), (20, 1074271), (22, 976610), (44, 488305), (55, 390644), (61, 352220), (110, 195322), (122, 176110), (220, 97661), (244, 88055), (305, 70444), (610, 35222), (671, 32020), (1220, 17611), (1342, 16010), (1601, 13420), (2684, 8005), (3202, 6710), (3355, 6404)]