20049440

素因数分解:

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

素因数の和:222

約数の個数: 72

約数和(自身を含む): 49385700

約数和(自身を除く): 29336260

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 80, 116, 145, 149, 160, 232, 290, 298, 464, 580, 596, 745, 841, 928, 1160, 1192, 1490, 1682, 2320, 2384, 2980, 3364, 4205, 4321, 4640, 4768, 5960, 6728, 8410, 8642, 11920, 13456, 16820, 17284, 21605, 23840, 26912, 33640, 34568, 43210, 67280, 69136, 86420, 125309, 134560, 138272, 172840, 250618, 345680, 501236, 626545, 691360, 1002472, 1253090, 2004944, 2506180, 4009888, 5012360, 10024720, 20049440]

約数ペア:

[(1, 20049440), (2, 10024720), (4, 5012360), (5, 4009888), (8, 2506180), (10, 2004944), (16, 1253090), (20, 1002472), (29, 691360), (32, 626545), (40, 501236), (58, 345680), (80, 250618), (116, 172840), (145, 138272), (149, 134560), (160, 125309), (232, 86420), (290, 69136), (298, 67280), (464, 43210), (580, 34568), (596, 33640), (745, 26912), (841, 23840), (928, 21605), (1160, 17284), (1192, 16820), (1490, 13456), (1682, 11920), (2320, 8642), (2384, 8410), (2980, 6728), (3364, 5960), (4205, 4768), (4321, 4640)]