20785830

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{223}}^1\times {\mathrm{239}}^1$

素因数の和:485

約数の個数: 64

約数和(自身を含む): 54190080

約数和(自身を除く): 33404250

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 223, 239, 390, 446, 478, 669, 717, 1115, 1195, 1338, 1434, 2230, 2390, 2899, 3107, 3345, 3585, 5798, 6214, 6690, 7170, 8697, 9321, 14495, 15535, 17394, 18642, 28990, 31070, 43485, 46605, 53297, 86970, 93210, 106594, 159891, 266485, 319782, 532970, 692861, 799455, 1385722, 1598910, 2078583, 3464305, 4157166, 6928610, 10392915, 20785830]

約数ペア:

[(1, 20785830), (2, 10392915), (3, 6928610), (5, 4157166), (6, 3464305), (10, 2078583), (13, 1598910), (15, 1385722), (26, 799455), (30, 692861), (39, 532970), (65, 319782), (78, 266485), (130, 159891), (195, 106594), (223, 93210), (239, 86970), (390, 53297), (446, 46605), (478, 43485), (669, 31070), (717, 28990), (1115, 18642), (1195, 17394), (1338, 15535), (1434, 14495), (2230, 9321), (2390, 8697), (2899, 7170), (3107, 6690), (3345, 6214), (3585, 5798)]