80973980

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{45491}}^1$

素因数の和:45589

約数の個数: 24

約数和(自身を含む): 171959760

約数和(自身を除く): 90985780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 45491, 90982, 181964, 227455, 454910, 909820, 4048699, 8097398, 16194796, 20243495, 40486990, 80973980]

約数ペア:

[(1, 80973980), (2, 40486990), (4, 20243495), (5, 16194796), (10, 8097398), (20, 4048699), (89, 909820), (178, 454910), (356, 227455), (445, 181964), (890, 90982), (1780, 45491)]