20787260

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4703}}^1$

素因数の和:4742

約数の個数: 48

約数和(自身を含む): 49787136

約数和(自身を除く): 28999876

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 4703, 9406, 18812, 23515, 47030, 61139, 79951, 94060, 122278, 159902, 244556, 305695, 319804, 399755, 611390, 799510, 1039363, 1222780, 1599020, 2078726, 4157452, 5196815, 10393630, 20787260]

約数ペア:

[(1, 20787260), (2, 10393630), (4, 5196815), (5, 4157452), (10, 2078726), (13, 1599020), (17, 1222780), (20, 1039363), (26, 799510), (34, 611390), (52, 399755), (65, 319804), (68, 305695), (85, 244556), (130, 159902), (170, 122278), (221, 94060), (260, 79951), (340, 61139), (442, 47030), (884, 23515), (1105, 18812), (2210, 9406), (4420, 4703)]