21435895

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1021}}^1$

素因数の和:1075

約数の個数: 32

約数和(自身を含む): 30905280

約数和(自身を除く): 9469385

約数列:

[1, 5, 13, 17, 19, 65, 85, 95, 221, 247, 323, 1021, 1105, 1235, 1615, 4199, 5105, 13273, 17357, 19399, 20995, 66365, 86785, 96995, 225641, 252187, 329783, 1128205, 1260935, 1648915, 4287179, 21435895]

約数ペア:

[(1, 21435895), (5, 4287179), (13, 1648915), (17, 1260935), (19, 1128205), (65, 329783), (85, 252187), (95, 225641), (221, 96995), (247, 86785), (323, 66365), (1021, 20995), (1105, 19399), (1235, 17357), (1615, 13273), (4199, 5105)]