218820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{521}}^1$

素因数の和:540

約数の個数: 48

約数和(自身を含む): 701568

約数和(自身を除く): 482748

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 521, 1042, 1563, 2084, 2605, 3126, 3647, 5210, 6252, 7294, 7815, 10420, 10941, 14588, 15630, 18235, 21882, 31260, 36470, 43764, 54705, 72940, 109410, 218820]

約数ペア:

[(1, 218820), (2, 109410), (3, 72940), (4, 54705), (5, 43764), (6, 36470), (7, 31260), (10, 21882), (12, 18235), (14, 15630), (15, 14588), (20, 10941), (21, 10420), (28, 7815), (30, 7294), (35, 6252), (42, 5210), (60, 3647), (70, 3126), (84, 2605), (105, 2084), (140, 1563), (210, 1042), (420, 521)]