21977505

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1531}}^1$

素因数の和:1582

約数の個数: 48

約数和(自身を含む): 43018560

約数和(自身を除く): 21041055

約数列:

[1, 3, 5, 9, 11, 15, 29, 33, 45, 55, 87, 99, 145, 165, 261, 319, 435, 495, 957, 1305, 1531, 1595, 2871, 4593, 4785, 7655, 13779, 14355, 16841, 22965, 44399, 50523, 68895, 84205, 133197, 151569, 221995, 252615, 399591, 488389, 665985, 757845, 1465167, 1997955, 2441945, 4395501, 7325835, 21977505]

約数ペア:

[(1, 21977505), (3, 7325835), (5, 4395501), (9, 2441945), (11, 1997955), (15, 1465167), (29, 757845), (33, 665985), (45, 488389), (55, 399591), (87, 252615), (99, 221995), (145, 151569), (165, 133197), (261, 84205), (319, 68895), (435, 50523), (495, 44399), (957, 22965), (1305, 16841), (1531, 14355), (1595, 13779), (2871, 7655), (4593, 4785)]