21384880

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1279}}^1$

素因数の和:1322

約数の個数: 80

約数和(自身を含む): 57139200

約数和(自身を除く): 35754320

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 19, 20, 22, 38, 40, 44, 55, 76, 80, 88, 95, 110, 152, 176, 190, 209, 220, 304, 380, 418, 440, 760, 836, 880, 1045, 1279, 1520, 1672, 2090, 2558, 3344, 4180, 5116, 6395, 8360, 10232, 12790, 14069, 16720, 20464, 24301, 25580, 28138, 48602, 51160, 56276, 70345, 97204, 102320, 112552, 121505, 140690, 194408, 225104, 243010, 267311, 281380, 388816, 486020, 534622, 562760, 972040, 1069244, 1125520, 1336555, 1944080, 2138488, 2673110, 4276976, 5346220, 10692440, 21384880]

約数ペア:

[(1, 21384880), (2, 10692440), (4, 5346220), (5, 4276976), (8, 2673110), (10, 2138488), (11, 1944080), (16, 1336555), (19, 1125520), (20, 1069244), (22, 972040), (38, 562760), (40, 534622), (44, 486020), (55, 388816), (76, 281380), (80, 267311), (88, 243010), (95, 225104), (110, 194408), (152, 140690), (176, 121505), (190, 112552), (209, 102320), (220, 97204), (304, 70345), (380, 56276), (418, 51160), (440, 48602), (760, 28138), (836, 25580), (880, 24301), (1045, 20464), (1279, 16720), (1520, 14069), (1672, 12790), (2090, 10232), (2558, 8360), (3344, 6395), (4180, 5116)]