19965771

素因数分解:

$3^4\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1531}}^1$

素因数の和:1573

約数の個数: 40

約数和(自身を含む): 35591424

約数和(自身を除く): 15625653

約数列:

[1, 3, 7, 9, 21, 23, 27, 63, 69, 81, 161, 189, 207, 483, 567, 621, 1449, 1531, 1863, 4347, 4593, 10717, 13041, 13779, 32151, 35213, 41337, 96453, 105639, 124011, 246491, 289359, 316917, 739473, 868077, 950751, 2218419, 2852253, 6655257, 19965771]

約数ペア:

[(1, 19965771), (3, 6655257), (7, 2852253), (9, 2218419), (21, 950751), (23, 868077), (27, 739473), (63, 316917), (69, 289359), (81, 246491), (161, 124011), (189, 105639), (207, 96453), (483, 41337), (567, 35213), (621, 32151), (1449, 13779), (1531, 13041), (1863, 10717), (4347, 4593)]