20450456

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{269}}^1$

素因数の和:348

約数の個数: 64

約数和(自身を含む): 44906400

約数和(自身を除く): 24455944

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 43, 52, 68, 86, 104, 136, 172, 221, 269, 344, 442, 538, 559, 731, 884, 1076, 1118, 1462, 1768, 2152, 2236, 2924, 3497, 4472, 4573, 5848, 6994, 9146, 9503, 11567, 13988, 18292, 19006, 23134, 27976, 36584, 38012, 46268, 59449, 76024, 92536, 118898, 150371, 196639, 237796, 300742, 393278, 475592, 601484, 786556, 1202968, 1573112, 2556307, 5112614, 10225228, 20450456]

約数ペア:

[(1, 20450456), (2, 10225228), (4, 5112614), (8, 2556307), (13, 1573112), (17, 1202968), (26, 786556), (34, 601484), (43, 475592), (52, 393278), (68, 300742), (86, 237796), (104, 196639), (136, 150371), (172, 118898), (221, 92536), (269, 76024), (344, 59449), (442, 46268), (538, 38012), (559, 36584), (731, 27976), (884, 23134), (1076, 19006), (1118, 18292), (1462, 13988), (1768, 11567), (2152, 9503), (2236, 9146), (2924, 6994), (3497, 5848), (4472, 4573)]