649720880

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{191}}^1\times {\mathrm{421}}^1$

素因数の和:726

約数の個数: 80

約数和(自身を含む): 1537187328

約数和(自身を除く): 887466448

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 191, 202, 382, 404, 421, 505, 764, 808, 842, 955, 1010, 1528, 1616, 1684, 1910, 2020, 2105, 3056, 3368, 3820, 4040, 4210, 6736, 7640, 8080, 8420, 15280, 16840, 19291, 33680, 38582, 42521, 77164, 80411, 85042, 96455, 154328, 160822, 170084, 192910, 212605, 308656, 321644, 340168, 385820, 402055, 425210, 643288, 680336, 771640, 804110, 850420, 1286576, 1543280, 1608220, 1700840, 3216440, 3401680, 6432880, 8121511, 16243022, 32486044, 40607555, 64972088, 81215110, 129944176, 162430220, 324860440, 649720880]

約数ペア:

[(1, 649720880), (2, 324860440), (4, 162430220), (5, 129944176), (8, 81215110), (10, 64972088), (16, 40607555), (20, 32486044), (40, 16243022), (80, 8121511), (101, 6432880), (191, 3401680), (202, 3216440), (382, 1700840), (404, 1608220), (421, 1543280), (505, 1286576), (764, 850420), (808, 804110), (842, 771640), (955, 680336), (1010, 643288), (1528, 425210), (1616, 402055), (1684, 385820), (1910, 340168), (2020, 321644), (2105, 308656), (3056, 212605), (3368, 192910), (3820, 170084), (4040, 160822), (4210, 154328), (6736, 96455), (7640, 85042), (8080, 80411), (8420, 77164), (15280, 42521), (16840, 38582), (19291, 33680)]