21845680

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{16063}}^1$

素因数の和:16093

約数の個数: 40

約数和(自身を含む): 53782272

約数和(自身を除く): 31936592

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 16063, 32126, 64252, 80315, 128504, 160630, 257008, 273071, 321260, 546142, 642520, 1092284, 1285040, 1365355, 2184568, 2730710, 4369136, 5461420, 10922840, 21845680]

約数ペア:

[(1, 21845680), (2, 10922840), (4, 5461420), (5, 4369136), (8, 2730710), (10, 2184568), (16, 1365355), (17, 1285040), (20, 1092284), (34, 642520), (40, 546142), (68, 321260), (80, 273071), (85, 257008), (136, 160630), (170, 128504), (272, 80315), (340, 64252), (680, 32126), (1360, 16063)]