20851664

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{607}}^1$

素因数の和:747

約数の個数: 40

約数和(自身を含む): 42973440

約数和(自身を除く): 22121776

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 113, 152, 226, 304, 452, 607, 904, 1214, 1808, 2147, 2428, 4294, 4856, 8588, 9712, 11533, 17176, 23066, 34352, 46132, 68591, 92264, 137182, 184528, 274364, 548728, 1097456, 1303229, 2606458, 5212916, 10425832, 20851664]

約数ペア:

[(1, 20851664), (2, 10425832), (4, 5212916), (8, 2606458), (16, 1303229), (19, 1097456), (38, 548728), (76, 274364), (113, 184528), (152, 137182), (226, 92264), (304, 68591), (452, 46132), (607, 34352), (904, 23066), (1214, 17176), (1808, 11533), (2147, 9712), (2428, 8588), (4294, 4856)]