20491970

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{809}}^1$

素因数の和:982

約数の個数: 32

約数和(自身を含む): 39366000

約数和(自身を除く): 18874030

約数列:

[1, 2, 5, 10, 17, 34, 85, 149, 170, 298, 745, 809, 1490, 1618, 2533, 4045, 5066, 8090, 12665, 13753, 25330, 27506, 68765, 120541, 137530, 241082, 602705, 1205410, 2049197, 4098394, 10245985, 20491970]

約数ペア:

[(1, 20491970), (2, 10245985), (5, 4098394), (10, 2049197), (17, 1205410), (34, 602705), (85, 241082), (149, 137530), (170, 120541), (298, 68765), (745, 27506), (809, 25330), (1490, 13753), (1618, 12665), (2533, 8090), (4045, 5066)]