20641984

素因数分解:

$2^6\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{269}}^1$

素因数の和:401

約数の個数: 56

約数和(自身を含む): 45262800

約数和(自身を除く): 24620816

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 44, 64, 88, 109, 176, 218, 269, 352, 436, 538, 704, 872, 1076, 1199, 1744, 2152, 2398, 2959, 3488, 4304, 4796, 5918, 6976, 8608, 9592, 11836, 17216, 19184, 23672, 29321, 38368, 47344, 58642, 76736, 94688, 117284, 189376, 234568, 322531, 469136, 645062, 938272, 1290124, 1876544, 2580248, 5160496, 10320992, 20641984]

約数ペア:

[(1, 20641984), (2, 10320992), (4, 5160496), (8, 2580248), (11, 1876544), (16, 1290124), (22, 938272), (32, 645062), (44, 469136), (64, 322531), (88, 234568), (109, 189376), (176, 117284), (218, 94688), (269, 76736), (352, 58642), (436, 47344), (538, 38368), (704, 29321), (872, 23672), (1076, 19184), (1199, 17216), (1744, 11836), (2152, 9592), (2398, 8608), (2959, 6976), (3488, 5918), (4304, 4796)]