21607820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{2027}}^1$

素因数の和:2090

約数の個数: 48

約数和(自身を含む): 50083488

約数和(自身を除く): 28475668

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 41, 52, 65, 82, 130, 164, 205, 260, 410, 533, 820, 1066, 2027, 2132, 2665, 4054, 5330, 8108, 10135, 10660, 20270, 26351, 40540, 52702, 83107, 105404, 131755, 166214, 263510, 332428, 415535, 527020, 831070, 1080391, 1662140, 2160782, 4321564, 5401955, 10803910, 21607820]

約数ペア:

[(1, 21607820), (2, 10803910), (4, 5401955), (5, 4321564), (10, 2160782), (13, 1662140), (20, 1080391), (26, 831070), (41, 527020), (52, 415535), (65, 332428), (82, 263510), (130, 166214), (164, 131755), (205, 105404), (260, 83107), (410, 52702), (533, 40540), (820, 26351), (1066, 20270), (2027, 10660), (2132, 10135), (2665, 8108), (4054, 5330)]