18888040

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7741}}^1$

素因数の和:7813

約数の個数: 32

約数和(自身を含む): 43200360

約数和(自身を除く): 24312320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 7741, 15482, 30964, 38705, 61928, 77410, 154820, 309640, 472201, 944402, 1888804, 2361005, 3777608, 4722010, 9444020, 18888040]

約数ペア:

[(1, 18888040), (2, 9444020), (4, 4722010), (5, 3777608), (8, 2361005), (10, 1888804), (20, 944402), (40, 472201), (61, 309640), (122, 154820), (244, 77410), (305, 61928), (488, 38705), (610, 30964), (1220, 15482), (2440, 7741)]