18400040

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7541}}^1$

素因数の和:7613

約数の個数: 32

約数和(自身を含む): 42084360

約数和(自身を除く): 23684320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 7541, 15082, 30164, 37705, 60328, 75410, 150820, 301640, 460001, 920002, 1840004, 2300005, 3680008, 4600010, 9200020, 18400040]

約数ペア:

[(1, 18400040), (2, 9200020), (4, 4600010), (5, 3680008), (8, 2300005), (10, 1840004), (20, 920002), (40, 460001), (61, 301640), (122, 150820), (244, 75410), (305, 60328), (488, 37705), (610, 30164), (1220, 15082), (2440, 7541)]