21286395

素因数分解:

$3^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{311}}^1$

素因数の和:354

約数の個数: 60

約数和(自身を含む): 41451696

約数和(自身を除く): 20165301

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 81, 117, 135, 169, 195, 311, 351, 405, 507, 585, 845, 933, 1053, 1521, 1555, 1755, 2535, 2799, 4043, 4563, 4665, 5265, 7605, 8397, 12129, 13689, 13995, 20215, 22815, 25191, 36387, 41985, 52559, 60645, 68445, 109161, 125955, 157677, 181935, 262795, 327483, 473031, 545805, 788385, 1419093, 1637415, 2365155, 4257279, 7095465, 21286395]

約数ペア:

[(1, 21286395), (3, 7095465), (5, 4257279), (9, 2365155), (13, 1637415), (15, 1419093), (27, 788385), (39, 545805), (45, 473031), (65, 327483), (81, 262795), (117, 181935), (135, 157677), (169, 125955), (195, 109161), (311, 68445), (351, 60645), (405, 52559), (507, 41985), (585, 36387), (845, 25191), (933, 22815), (1053, 20215), (1521, 13995), (1555, 13689), (1755, 12129), (2535, 8397), (2799, 7605), (4043, 5265), (4563, 4665)]