18656980

素因数分解:

$2^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{97}}^1\times {\mathrm{163}}^1$

素因数の和:328

約数の個数: 48

約数和(自身を含む): 40501440

約数和(自身を除く): 21844460

約数列:

[1, 2, 4, 5, 10, 20, 59, 97, 118, 163, 194, 236, 295, 326, 388, 485, 590, 652, 815, 970, 1180, 1630, 1940, 3260, 5723, 9617, 11446, 15811, 19234, 22892, 28615, 31622, 38468, 48085, 57230, 63244, 79055, 96170, 114460, 158110, 192340, 316220, 932849, 1865698, 3731396, 4664245, 9328490, 18656980]

約数ペア:

[(1, 18656980), (2, 9328490), (4, 4664245), (5, 3731396), (10, 1865698), (20, 932849), (59, 316220), (97, 192340), (118, 158110), (163, 114460), (194, 96170), (236, 79055), (295, 63244), (326, 57230), (388, 48085), (485, 38468), (590, 31622), (652, 28615), (815, 22892), (970, 19234), (1180, 15811), (1630, 11446), (1940, 9617), (3260, 5723)]