621747

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:223

約数の個数: 24

約数和(自身を含む): 1048320

約数和(自身を除く): 426573

約数列:

[1, 3, 7, 9, 21, 63, 71, 139, 213, 417, 497, 639, 973, 1251, 1491, 2919, 4473, 8757, 9869, 29607, 69083, 88821, 207249, 621747]

約数ペア:

[(1, 621747), (3, 207249), (7, 88821), (9, 69083), (21, 29607), (63, 9869), (71, 8757), (139, 4473), (213, 2919), (417, 1491), (497, 1251), (639, 973)]