18905680

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^2\times {\mathrm{281}}^1$

素因数の和:352

約数の個数: 60

約数和(自身を含む): 45685692

約数和(自身を除く): 26780012

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 281, 290, 464, 562, 580, 841, 1124, 1160, 1405, 1682, 2248, 2320, 2810, 3364, 4205, 4496, 5620, 6728, 8149, 8410, 11240, 13456, 16298, 16820, 22480, 32596, 33640, 40745, 65192, 67280, 81490, 130384, 162980, 236321, 325960, 472642, 651920, 945284, 1181605, 1890568, 2363210, 3781136, 4726420, 9452840, 18905680]

約数ペア:

[(1, 18905680), (2, 9452840), (4, 4726420), (5, 3781136), (8, 2363210), (10, 1890568), (16, 1181605), (20, 945284), (29, 651920), (40, 472642), (58, 325960), (80, 236321), (116, 162980), (145, 130384), (232, 81490), (281, 67280), (290, 65192), (464, 40745), (562, 33640), (580, 32596), (841, 22480), (1124, 16820), (1160, 16298), (1405, 13456), (1682, 11240), (2248, 8410), (2320, 8149), (2810, 6728), (3364, 5620), (4205, 4496)]