21877520

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{5581}}^1$

素因数の和:5608

約数の個数: 60

約数和(自身を含む): 59180364

約数和(自身を除く): 37302844

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5581, 11162, 22324, 27905, 39067, 44648, 55810, 78134, 89296, 111620, 156268, 195335, 223240, 273469, 312536, 390670, 446480, 546938, 625072, 781340, 1093876, 1367345, 1562680, 2187752, 2734690, 3125360, 4375504, 5469380, 10938760, 21877520]

約数ペア:

[(1, 21877520), (2, 10938760), (4, 5469380), (5, 4375504), (7, 3125360), (8, 2734690), (10, 2187752), (14, 1562680), (16, 1367345), (20, 1093876), (28, 781340), (35, 625072), (40, 546938), (49, 446480), (56, 390670), (70, 312536), (80, 273469), (98, 223240), (112, 195335), (140, 156268), (196, 111620), (245, 89296), (280, 78134), (392, 55810), (490, 44648), (560, 39067), (784, 27905), (980, 22324), (1960, 11162), (3920, 5581)]