18906885

素因数分解:

$3^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{3257}}^1$

素因数の和:3314

約数の個数: 32

約数和(自身を含む): 34404480

約数和(自身を除く): 15497595

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 129, 135, 215, 387, 645, 1161, 1935, 3257, 5805, 9771, 16285, 29313, 48855, 87939, 140051, 146565, 420153, 439695, 700255, 1260459, 2100765, 3781377, 6302295, 18906885]

約数ペア:

[(1, 18906885), (3, 6302295), (5, 3781377), (9, 2100765), (15, 1260459), (27, 700255), (43, 439695), (45, 420153), (129, 146565), (135, 140051), (215, 87939), (387, 48855), (645, 29313), (1161, 16285), (1935, 9771), (3257, 5805)]