21576760

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{499}}^1$

素因数の和:580

約数の個数: 64

約数和(自身を含む): 51840000

約数和(自身を除く): 30263240

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 47, 92, 94, 115, 184, 188, 230, 235, 376, 460, 470, 499, 920, 940, 998, 1081, 1880, 1996, 2162, 2495, 3992, 4324, 4990, 5405, 8648, 9980, 10810, 11477, 19960, 21620, 22954, 23453, 43240, 45908, 46906, 57385, 91816, 93812, 114770, 117265, 187624, 229540, 234530, 459080, 469060, 539419, 938120, 1078838, 2157676, 2697095, 4315352, 5394190, 10788380, 21576760]

約数ペア:

[(1, 21576760), (2, 10788380), (4, 5394190), (5, 4315352), (8, 2697095), (10, 2157676), (20, 1078838), (23, 938120), (40, 539419), (46, 469060), (47, 459080), (92, 234530), (94, 229540), (115, 187624), (184, 117265), (188, 114770), (230, 93812), (235, 91816), (376, 57385), (460, 46906), (470, 45908), (499, 43240), (920, 23453), (940, 22954), (998, 21620), (1081, 19960), (1880, 11477), (1996, 10810), (2162, 9980), (2495, 8648), (3992, 5405), (4324, 4990)]