21921705

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{12491}}^1$

素因数の和:12518

約数の個数: 32

約数和(自身を含む): 41973120

約数和(自身を除く): 20051415

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 117, 135, 195, 351, 585, 1755, 12491, 37473, 62455, 112419, 162383, 187365, 337257, 487149, 562095, 811915, 1461447, 1686285, 2435745, 4384341, 7307235, 21921705]

約数ペア:

[(1, 21921705), (3, 7307235), (5, 4384341), (9, 2435745), (13, 1686285), (15, 1461447), (27, 811915), (39, 562095), (45, 487149), (65, 337257), (117, 187365), (135, 162383), (195, 112419), (351, 62455), (585, 37473), (1755, 12491)]