19605640

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{163}}^1$

素因数の和:302

約数の個数: 64

約数和(自身を含む): 46287360

約数和(自身を除く): 26681720

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 97, 124, 155, 163, 194, 248, 310, 326, 388, 485, 620, 652, 776, 815, 970, 1240, 1304, 1630, 1940, 3007, 3260, 3880, 5053, 6014, 6520, 10106, 12028, 15035, 15811, 20212, 24056, 25265, 30070, 31622, 40424, 50530, 60140, 63244, 79055, 101060, 120280, 126488, 158110, 202120, 316220, 490141, 632440, 980282, 1960564, 2450705, 3921128, 4901410, 9802820, 19605640]

約数ペア:

[(1, 19605640), (2, 9802820), (4, 4901410), (5, 3921128), (8, 2450705), (10, 1960564), (20, 980282), (31, 632440), (40, 490141), (62, 316220), (97, 202120), (124, 158110), (155, 126488), (163, 120280), (194, 101060), (248, 79055), (310, 63244), (326, 60140), (388, 50530), (485, 40424), (620, 31622), (652, 30070), (776, 25265), (815, 24056), (970, 20212), (1240, 15811), (1304, 15035), (1630, 12028), (1940, 10106), (3007, 6520), (3260, 6014), (3880, 5053)]