21247268

素因数分解:

$2^2\times 7^1\times {\mathrm{97}}^1\times {\mathrm{7823}}^1$

素因数の和:7931

約数の個数: 24

約数和(自身を含む): 42938112

約数和(自身を除く): 21690844

約数列:

[1, 2, 4, 7, 14, 28, 97, 194, 388, 679, 1358, 2716, 7823, 15646, 31292, 54761, 109522, 219044, 758831, 1517662, 3035324, 5311817, 10623634, 21247268]

約数ペア:

[(1, 21247268), (2, 10623634), (4, 5311817), (7, 3035324), (14, 1517662), (28, 758831), (97, 219044), (194, 109522), (388, 54761), (679, 31292), (1358, 15646), (2716, 7823)]