128912890

素因数分解:

$2^1\times 5^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1\times {\mathrm{1289}}^1$

素因数の和:1506

約数の個数: 32

約数和(自身を含む): 237122640

約数和(自身を除く): 108209750

約数列:

[1, 2, 5, 10, 73, 137, 146, 274, 365, 685, 730, 1289, 1370, 2578, 6445, 10001, 12890, 20002, 50005, 94097, 100010, 176593, 188194, 353186, 470485, 882965, 940970, 1765930, 12891289, 25782578, 64456445, 128912890]

約数ペア:

[(1, 128912890), (2, 64456445), (5, 25782578), (10, 12891289), (73, 1765930), (137, 940970), (146, 882965), (274, 470485), (365, 353186), (685, 188194), (730, 176593), (1289, 100010), (1370, 94097), (2578, 50005), (6445, 20002), (10001, 12890)]