18785560

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7699}}^1$

素因数の和:7771

約数の個数: 32

約数和(自身を含む): 42966000

約数和(自身を除く): 24180440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 7699, 15398, 30796, 38495, 61592, 76990, 153980, 307960, 469639, 939278, 1878556, 2348195, 3757112, 4696390, 9392780, 18785560]

約数ペア:

[(1, 18785560), (2, 9392780), (4, 4696390), (5, 3757112), (8, 2348195), (10, 1878556), (20, 939278), (40, 469639), (61, 307960), (122, 153980), (244, 76990), (305, 61592), (488, 38495), (610, 30796), (1220, 15398), (2440, 7699)]