19647856

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{491}}^1$

素因数の和:601

約数の個数: 40

約数和(自身を含む): 39716208

約数和(自身を除く): 20068352

約数列:

[1, 2, 4, 8, 16, 41, 61, 82, 122, 164, 244, 328, 488, 491, 656, 976, 982, 1964, 2501, 3928, 5002, 7856, 10004, 20008, 20131, 29951, 40016, 40262, 59902, 80524, 119804, 161048, 239608, 322096, 479216, 1227991, 2455982, 4911964, 9823928, 19647856]

約数ペア:

[(1, 19647856), (2, 9823928), (4, 4911964), (8, 2455982), (16, 1227991), (41, 479216), (61, 322096), (82, 239608), (122, 161048), (164, 119804), (244, 80524), (328, 59902), (488, 40262), (491, 40016), (656, 29951), (976, 20131), (982, 20008), (1964, 10004), (2501, 7856), (3928, 5002)]