81178520

素因数分解:

$2^3\times 5^1\times {\mathrm{173}}^1\times {\mathrm{11731}}^1$

素因数の和:11915

約数の個数: 32

約数和(自身を含む): 183723120

約数和(自身を除く): 102544600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 173, 346, 692, 865, 1384, 1730, 3460, 6920, 11731, 23462, 46924, 58655, 93848, 117310, 234620, 469240, 2029463, 4058926, 8117852, 10147315, 16235704, 20294630, 40589260, 81178520]

約数ペア:

[(1, 81178520), (2, 40589260), (4, 20294630), (5, 16235704), (8, 10147315), (10, 8117852), (20, 4058926), (40, 2029463), (173, 469240), (346, 234620), (692, 117310), (865, 93848), (1384, 58655), (1730, 46924), (3460, 23462), (6920, 11731)]