21486520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{1039}}^1$

素因数の和:1108

約数の個数: 64

約数和(自身を含む): 53913600

約数和(自身を除く): 32427080

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 47, 55, 88, 94, 110, 188, 220, 235, 376, 440, 470, 517, 940, 1034, 1039, 1880, 2068, 2078, 2585, 4136, 4156, 5170, 5195, 8312, 10340, 10390, 11429, 20680, 20780, 22858, 41560, 45716, 48833, 57145, 91432, 97666, 114290, 195332, 228580, 244165, 390664, 457160, 488330, 537163, 976660, 1074326, 1953320, 2148652, 2685815, 4297304, 5371630, 10743260, 21486520]

約数ペア:

[(1, 21486520), (2, 10743260), (4, 5371630), (5, 4297304), (8, 2685815), (10, 2148652), (11, 1953320), (20, 1074326), (22, 976660), (40, 537163), (44, 488330), (47, 457160), (55, 390664), (88, 244165), (94, 228580), (110, 195332), (188, 114290), (220, 97666), (235, 91432), (376, 57145), (440, 48833), (470, 45716), (517, 41560), (940, 22858), (1034, 20780), (1039, 20680), (1880, 11429), (2068, 10390), (2078, 10340), (2585, 8312), (4136, 5195), (4156, 5170)]