21518715

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{131}}^1\times {\mathrm{233}}^1$

素因数の和:419

約数の個数: 32

約数和(自身を含む): 35582976

約数和(自身を除く): 14064261

約数列:

[1, 3, 5, 15, 47, 131, 141, 233, 235, 393, 655, 699, 705, 1165, 1965, 3495, 6157, 10951, 18471, 30523, 30785, 32853, 54755, 91569, 92355, 152615, 164265, 457845, 1434581, 4303743, 7172905, 21518715]

約数ペア:

[(1, 21518715), (3, 7172905), (5, 4303743), (15, 1434581), (47, 457845), (131, 164265), (141, 152615), (233, 92355), (235, 91569), (393, 54755), (655, 32853), (699, 30785), (705, 30523), (1165, 18471), (1965, 10951), (3495, 6157)]