639443696

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{16319}}^1$

素因数の和:16437

約数の個数: 40

約数和(自身を含む): 1295155200

約数和(自身を除く): 655711504

約数列:

[1, 2, 4, 8, 16, 31, 62, 79, 124, 158, 248, 316, 496, 632, 1264, 2449, 4898, 9796, 16319, 19592, 32638, 39184, 65276, 130552, 261104, 505889, 1011778, 1289201, 2023556, 2578402, 4047112, 5156804, 8094224, 10313608, 20627216, 39965231, 79930462, 159860924, 319721848, 639443696]

約数ペア:

[(1, 639443696), (2, 319721848), (4, 159860924), (8, 79930462), (16, 39965231), (31, 20627216), (62, 10313608), (79, 8094224), (124, 5156804), (158, 4047112), (248, 2578402), (316, 2023556), (496, 1289201), (632, 1011778), (1264, 505889), (2449, 261104), (4898, 130552), (9796, 65276), (16319, 39184), (19592, 32638)]