21911823

素因数分解:

$3^3\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{557}}^1$

素因数の和:644

約数の個数: 32

約数和(自身を含む): 34283520

約数和(自身を除く): 12371697

約数列:

[1, 3, 9, 27, 31, 47, 93, 141, 279, 423, 557, 837, 1269, 1457, 1671, 4371, 5013, 13113, 15039, 17267, 26179, 39339, 51801, 78537, 155403, 235611, 466209, 706833, 811549, 2434647, 7303941, 21911823]

約数ペア:

[(1, 21911823), (3, 7303941), (9, 2434647), (27, 811549), (31, 706833), (47, 466209), (93, 235611), (141, 155403), (279, 78537), (423, 51801), (557, 39339), (837, 26179), (1269, 17267), (1457, 15039), (1671, 13113), (4371, 5013)]