21890655

素因数分解:

$3^5\times 5^1\times {\mathrm{43}}^1\times {\mathrm{419}}^1$

素因数の和:482

約数の個数: 48

約数和(自身を含む): 40360320

約数和(自身を除く): 18469665

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 81, 129, 135, 215, 243, 387, 405, 419, 645, 1161, 1215, 1257, 1935, 2095, 3483, 3771, 5805, 6285, 10449, 11313, 17415, 18017, 18855, 33939, 52245, 54051, 56565, 90085, 101817, 162153, 169695, 270255, 486459, 509085, 810765, 1459377, 2432295, 4378131, 7296885, 21890655]

約数ペア:

[(1, 21890655), (3, 7296885), (5, 4378131), (9, 2432295), (15, 1459377), (27, 810765), (43, 509085), (45, 486459), (81, 270255), (129, 169695), (135, 162153), (215, 101817), (243, 90085), (387, 56565), (405, 54051), (419, 52245), (645, 33939), (1161, 18855), (1215, 18017), (1257, 17415), (1935, 11313), (2095, 10449), (3483, 6285), (3771, 5805)]