20129990

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{83}}^1\times {\mathrm{307}}^1$

素因数の和:476

約数の個数: 32

約数和(自身を含む): 37255680

約数和(自身を除く): 17125690

約数列:

[1, 2, 5, 10, 79, 83, 158, 166, 307, 395, 415, 614, 790, 830, 1535, 3070, 6557, 13114, 24253, 25481, 32785, 48506, 50962, 65570, 121265, 127405, 242530, 254810, 2012999, 4025998, 10064995, 20129990]

約数ペア:

[(1, 20129990), (2, 10064995), (5, 4025998), (10, 2012999), (79, 254810), (83, 242530), (158, 127405), (166, 121265), (307, 65570), (395, 50962), (415, 48506), (614, 32785), (790, 25481), (830, 24253), (1535, 13114), (3070, 6557)]