661664816

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{27551}}^1$

素因数の和:27657

約数の個数: 40

約数和(自身を含む): 1366579200

約数和(自身を除く): 704914384

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 79, 152, 158, 304, 316, 632, 1264, 1501, 3002, 6004, 12008, 24016, 27551, 55102, 110204, 220408, 440816, 523469, 1046938, 2093876, 2176529, 4187752, 4353058, 8375504, 8706116, 17412232, 34824464, 41354051, 82708102, 165416204, 330832408, 661664816]

約数ペア:

[(1, 661664816), (2, 330832408), (4, 165416204), (8, 82708102), (16, 41354051), (19, 34824464), (38, 17412232), (76, 8706116), (79, 8375504), (152, 4353058), (158, 4187752), (304, 2176529), (316, 2093876), (632, 1046938), (1264, 523469), (1501, 440816), (3002, 220408), (6004, 110204), (12008, 55102), (24016, 27551)]