20291145

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1453}}^1$

素因数の和:1494

約数の個数: 48

約数和(自身を含む): 39781440

約数和(自身を除く): 19490295

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 49, 57, 95, 105, 133, 147, 245, 285, 399, 665, 735, 931, 1453, 1995, 2793, 4359, 4655, 7265, 10171, 13965, 21795, 27607, 30513, 50855, 71197, 82821, 138035, 152565, 193249, 213591, 355985, 414105, 579747, 966245, 1067955, 1352743, 2898735, 4058229, 6763715, 20291145]

約数ペア:

[(1, 20291145), (3, 6763715), (5, 4058229), (7, 2898735), (15, 1352743), (19, 1067955), (21, 966245), (35, 579747), (49, 414105), (57, 355985), (95, 213591), (105, 193249), (133, 152565), (147, 138035), (245, 82821), (285, 71197), (399, 50855), (665, 30513), (735, 27607), (931, 21795), (1453, 13965), (1995, 10171), (2793, 7265), (4359, 4655)]