20975840

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4229}}^1$

素因数の和:4275

約数の個数: 48

約数和(自身を含む): 51166080

約数和(自身を除く): 30190240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4229, 4960, 8458, 16916, 21145, 33832, 42290, 67664, 84580, 131099, 135328, 169160, 262198, 338320, 524396, 655495, 676640, 1048792, 1310990, 2097584, 2621980, 4195168, 5243960, 10487920, 20975840]

約数ペア:

[(1, 20975840), (2, 10487920), (4, 5243960), (5, 4195168), (8, 2621980), (10, 2097584), (16, 1310990), (20, 1048792), (31, 676640), (32, 655495), (40, 524396), (62, 338320), (80, 262198), (124, 169160), (155, 135328), (160, 131099), (248, 84580), (310, 67664), (496, 42290), (620, 33832), (992, 21145), (1240, 16916), (2480, 8458), (4229, 4960)]