81465880

素因数分解:

$2^3\times 5^1\times {\mathrm{503}}^1\times {\mathrm{4049}}^1$

素因数の和:4563

約数の個数: 32

約数和(自身を含む): 183708000

約数和(自身を除く): 102242120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 503, 1006, 2012, 2515, 4024, 4049, 5030, 8098, 10060, 16196, 20120, 20245, 32392, 40490, 80980, 161960, 2036647, 4073294, 8146588, 10183235, 16293176, 20366470, 40732940, 81465880]

約数ペア:

[(1, 81465880), (2, 40732940), (4, 20366470), (5, 16293176), (8, 10183235), (10, 8146588), (20, 4073294), (40, 2036647), (503, 161960), (1006, 80980), (2012, 40490), (2515, 32392), (4024, 20245), (4049, 20120), (5030, 16196), (8098, 10060)]