28172920

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{149}}^1\times {\mathrm{163}}^1$

素因数の和:352

約数の個数: 64

約数和(自身を含む): 66420000

約数和(自身を除く): 38247080

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 149, 163, 232, 290, 298, 326, 580, 596, 652, 745, 815, 1160, 1192, 1304, 1490, 1630, 2980, 3260, 4321, 4727, 5960, 6520, 8642, 9454, 17284, 18908, 21605, 23635, 24287, 34568, 37816, 43210, 47270, 48574, 86420, 94540, 97148, 121435, 172840, 189080, 194296, 242870, 485740, 704323, 971480, 1408646, 2817292, 3521615, 5634584, 7043230, 14086460, 28172920]

約数ペア:

[(1, 28172920), (2, 14086460), (4, 7043230), (5, 5634584), (8, 3521615), (10, 2817292), (20, 1408646), (29, 971480), (40, 704323), (58, 485740), (116, 242870), (145, 194296), (149, 189080), (163, 172840), (232, 121435), (290, 97148), (298, 94540), (326, 86420), (580, 48574), (596, 47270), (652, 43210), (745, 37816), (815, 34568), (1160, 24287), (1192, 23635), (1304, 21605), (1490, 18908), (1630, 17284), (2980, 9454), (3260, 8642), (4321, 6520), (4727, 5960)]