18243880

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7477}}^1$

素因数の和:7549

約数の個数: 32

約数和(自身を含む): 41727240

約数和(自身を除く): 23483360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 7477, 14954, 29908, 37385, 59816, 74770, 149540, 299080, 456097, 912194, 1824388, 2280485, 3648776, 4560970, 9121940, 18243880]

約数ペア:

[(1, 18243880), (2, 9121940), (4, 4560970), (5, 3648776), (8, 2280485), (10, 1824388), (20, 912194), (40, 456097), (61, 299080), (122, 149540), (244, 74770), (305, 59816), (488, 37385), (610, 29908), (1220, 14954), (2440, 7477)]