409137040

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{393401}}^1$

素因数の和:393427

約数の個数: 40

約数和(自身を含む): 1024418808

約数和(自身を除く): 615281768

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 393401, 786802, 1573604, 1967005, 3147208, 3934010, 5114213, 6294416, 7868020, 10228426, 15736040, 20456852, 25571065, 31472080, 40913704, 51142130, 81827408, 102284260, 204568520, 409137040]

約数ペア:

[(1, 409137040), (2, 204568520), (4, 102284260), (5, 81827408), (8, 51142130), (10, 40913704), (13, 31472080), (16, 25571065), (20, 20456852), (26, 15736040), (40, 10228426), (52, 7868020), (65, 6294416), (80, 5114213), (104, 3934010), (130, 3147208), (208, 1967005), (260, 1573604), (520, 786802), (1040, 393401)]