20445560

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{281}}^1$

素因数の和:416

約数の個数: 64

約数和(自身を含む): 49338720

約数和(自身を除く): 28893160

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 107, 136, 170, 214, 281, 340, 428, 535, 562, 680, 856, 1070, 1124, 1405, 1819, 2140, 2248, 2810, 3638, 4280, 4777, 5620, 7276, 9095, 9554, 11240, 14552, 18190, 19108, 23885, 30067, 36380, 38216, 47770, 60134, 72760, 95540, 120268, 150335, 191080, 240536, 300670, 511139, 601340, 1022278, 1202680, 2044556, 2555695, 4089112, 5111390, 10222780, 20445560]

約数ペア:

[(1, 20445560), (2, 10222780), (4, 5111390), (5, 4089112), (8, 2555695), (10, 2044556), (17, 1202680), (20, 1022278), (34, 601340), (40, 511139), (68, 300670), (85, 240536), (107, 191080), (136, 150335), (170, 120268), (214, 95540), (281, 72760), (340, 60134), (428, 47770), (535, 38216), (562, 36380), (680, 30067), (856, 23885), (1070, 19108), (1124, 18190), (1405, 14552), (1819, 11240), (2140, 9554), (2248, 9095), (2810, 7276), (3638, 5620), (4280, 4777)]