20110040

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1$

素因数の和:252

約数の個数: 64

約数和(自身を含む): 46992960

約数和(自身を除く): 26882920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 73, 97, 142, 146, 194, 284, 292, 355, 365, 388, 485, 568, 584, 710, 730, 776, 970, 1420, 1460, 1940, 2840, 2920, 3880, 5183, 6887, 7081, 10366, 13774, 14162, 20732, 25915, 27548, 28324, 34435, 35405, 41464, 51830, 55096, 56648, 68870, 70810, 103660, 137740, 141620, 207320, 275480, 283240, 502751, 1005502, 2011004, 2513755, 4022008, 5027510, 10055020, 20110040]

約数ペア:

[(1, 20110040), (2, 10055020), (4, 5027510), (5, 4022008), (8, 2513755), (10, 2011004), (20, 1005502), (40, 502751), (71, 283240), (73, 275480), (97, 207320), (142, 141620), (146, 137740), (194, 103660), (284, 70810), (292, 68870), (355, 56648), (365, 55096), (388, 51830), (485, 41464), (568, 35405), (584, 34435), (710, 28324), (730, 27548), (776, 25915), (970, 20732), (1420, 14162), (1460, 13774), (1940, 10366), (2840, 7081), (2920, 6887), (3880, 5183)]