21000887984

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{764447}}^1$

素因数の和:764573

約数の個数: 40

約数和(自身を含む): 43509322368

約数和(自身を除く): 22508434384

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 101, 136, 202, 272, 404, 808, 1616, 1717, 3434, 6868, 13736, 27472, 764447, 1528894, 3057788, 6115576, 12231152, 12995599, 25991198, 51982396, 77209147, 103964792, 154418294, 207929584, 308836588, 617673176, 1235346352, 1312555499, 2625110998, 5250221996, 10500443992, 21000887984]

約数ペア:

[(1, 21000887984), (2, 10500443992), (4, 5250221996), (8, 2625110998), (16, 1312555499), (17, 1235346352), (34, 617673176), (68, 308836588), (101, 207929584), (136, 154418294), (202, 103964792), (272, 77209147), (404, 51982396), (808, 25991198), (1616, 12995599), (1717, 12231152), (3434, 6115576), (6868, 3057788), (13736, 1528894), (27472, 764447)]