21376520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2557}}^1$

素因数の和:2598

約数の個数: 64

約数和(自身を含む): 55252800

約数和(自身を除く): 33876280

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 38, 40, 44, 55, 76, 88, 95, 110, 152, 190, 209, 220, 380, 418, 440, 760, 836, 1045, 1672, 2090, 2557, 4180, 5114, 8360, 10228, 12785, 20456, 25570, 28127, 48583, 51140, 56254, 97166, 102280, 112508, 140635, 194332, 225016, 242915, 281270, 388664, 485830, 534413, 562540, 971660, 1068826, 1125080, 1943320, 2137652, 2672065, 4275304, 5344130, 10688260, 21376520]

約数ペア:

[(1, 21376520), (2, 10688260), (4, 5344130), (5, 4275304), (8, 2672065), (10, 2137652), (11, 1943320), (19, 1125080), (20, 1068826), (22, 971660), (38, 562540), (40, 534413), (44, 485830), (55, 388664), (76, 281270), (88, 242915), (95, 225016), (110, 194332), (152, 140635), (190, 112508), (209, 102280), (220, 97166), (380, 56254), (418, 51140), (440, 48583), (760, 28127), (836, 25570), (1045, 20456), (1672, 12785), (2090, 10228), (2557, 8360), (4180, 5114)]