21450715

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1579}}^1$

素因数の和:1627

約数の個数: 32

約数和(自身を含む): 31852800

約数和(自身を除く): 10402085

約数列:

[1, 5, 11, 13, 19, 55, 65, 95, 143, 209, 247, 715, 1045, 1235, 1579, 2717, 7895, 13585, 17369, 20527, 30001, 86845, 102635, 150005, 225797, 330011, 390013, 1128985, 1650055, 1950065, 4290143, 21450715]

約数ペア:

[(1, 21450715), (5, 4290143), (11, 1950065), (13, 1650055), (19, 1128985), (55, 390013), (65, 330011), (95, 225797), (143, 150005), (209, 102635), (247, 86845), (715, 30001), (1045, 20527), (1235, 17369), (1579, 13585), (2717, 7895)]