21190160

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15581}}^1$

素因数の和:15611

約数の個数: 40

約数和(自身を含む): 52168536

約数和(自身を除く): 30978376

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15581, 31162, 62324, 77905, 124648, 155810, 249296, 264877, 311620, 529754, 623240, 1059508, 1246480, 1324385, 2119016, 2648770, 4238032, 5297540, 10595080, 21190160]

約数ペア:

[(1, 21190160), (2, 10595080), (4, 5297540), (5, 4238032), (8, 2648770), (10, 2119016), (16, 1324385), (17, 1246480), (20, 1059508), (34, 623240), (40, 529754), (68, 311620), (80, 264877), (85, 249296), (136, 155810), (170, 124648), (272, 77905), (340, 62324), (680, 31162), (1360, 15581)]