18778520

素因数分解:

$2^3\times 5^1\times {\mathrm{59}}^1\times {\mathrm{73}}^1\times {\mathrm{109}}^1$

素因数の和:252

約数の個数: 64

約数和(自身を含む): 43956000

約数和(自身を除く): 25177480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 59, 73, 109, 118, 146, 218, 236, 292, 295, 365, 436, 472, 545, 584, 590, 730, 872, 1090, 1180, 1460, 2180, 2360, 2920, 4307, 4360, 6431, 7957, 8614, 12862, 15914, 17228, 21535, 25724, 31828, 32155, 34456, 39785, 43070, 51448, 63656, 64310, 79570, 86140, 128620, 159140, 172280, 257240, 318280, 469463, 938926, 1877852, 2347315, 3755704, 4694630, 9389260, 18778520]

約数ペア:

[(1, 18778520), (2, 9389260), (4, 4694630), (5, 3755704), (8, 2347315), (10, 1877852), (20, 938926), (40, 469463), (59, 318280), (73, 257240), (109, 172280), (118, 159140), (146, 128620), (218, 86140), (236, 79570), (292, 64310), (295, 63656), (365, 51448), (436, 43070), (472, 39785), (545, 34456), (584, 32155), (590, 31828), (730, 25724), (872, 21535), (1090, 17228), (1180, 15914), (1460, 12862), (2180, 8614), (2360, 7957), (2920, 6431), (4307, 4360)]