21750160

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{4457}}^1$

素因数の和:4531

約数の個数: 40

約数和(自身を含む): 51409656

約数和(自身を除く): 29659496

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 4457, 4880, 8914, 17828, 22285, 35656, 44570, 71312, 89140, 178280, 271877, 356560, 543754, 1087508, 1359385, 2175016, 2718770, 4350032, 5437540, 10875080, 21750160]

約数ペア:

[(1, 21750160), (2, 10875080), (4, 5437540), (5, 4350032), (8, 2718770), (10, 2175016), (16, 1359385), (20, 1087508), (40, 543754), (61, 356560), (80, 271877), (122, 178280), (244, 89140), (305, 71312), (488, 44570), (610, 35656), (976, 22285), (1220, 17828), (2440, 8914), (4457, 4880)]