81397940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{10099}}^1$

素因数の和:10152

約数の個数: 48

約数和(自身を含む): 190041600

約数和(自身を除く): 108643660

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 260, 310, 403, 620, 806, 1612, 2015, 4030, 8060, 10099, 20198, 40396, 50495, 100990, 131287, 201980, 262574, 313069, 525148, 626138, 656435, 1252276, 1312870, 1565345, 2625740, 3130690, 4069897, 6261380, 8139794, 16279588, 20349485, 40698970, 81397940]

約数ペア:

[(1, 81397940), (2, 40698970), (4, 20349485), (5, 16279588), (10, 8139794), (13, 6261380), (20, 4069897), (26, 3130690), (31, 2625740), (52, 1565345), (62, 1312870), (65, 1252276), (124, 656435), (130, 626138), (155, 525148), (260, 313069), (310, 262574), (403, 201980), (620, 131287), (806, 100990), (1612, 50495), (2015, 40396), (4030, 20198), (8060, 10099)]