21620805

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{2161}}^1$

素因数の和:2221

約数の個数: 32

約数和(自身を含む): 37359360

約数和(自身を除く): 15738555

約数列:

[1, 3, 5, 15, 23, 29, 69, 87, 115, 145, 345, 435, 667, 2001, 2161, 3335, 6483, 10005, 10805, 32415, 49703, 62669, 149109, 188007, 248515, 313345, 745545, 940035, 1441387, 4324161, 7206935, 21620805]

約数ペア:

[(1, 21620805), (3, 7206935), (5, 4324161), (15, 1441387), (23, 940035), (29, 745545), (69, 313345), (87, 248515), (115, 188007), (145, 149109), (345, 62669), (435, 49703), (667, 32415), (2001, 10805), (2161, 10005), (3335, 6483)]