81771560

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157253}}^1$

素因数の和:157277

約数の個数: 32

約数和(自身を含む): 198140040

約数和(自身を除く): 116368480

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 157253, 314506, 629012, 786265, 1258024, 1572530, 2044289, 3145060, 4088578, 6290120, 8177156, 10221445, 16354312, 20442890, 40885780, 81771560]

約数ペア:

[(1, 81771560), (2, 40885780), (4, 20442890), (5, 16354312), (8, 10221445), (10, 8177156), (13, 6290120), (20, 4088578), (26, 3145060), (40, 2044289), (52, 1572530), (65, 1258024), (104, 786265), (130, 629012), (260, 314506), (520, 157253)]