21785920

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{5237}}^1$

素因数の和:5267

約数の個数: 56

約数和(自身を含む): 55878984

約数和(自身を除く): 34093064

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 208, 260, 320, 416, 520, 832, 1040, 2080, 4160, 5237, 10474, 20948, 26185, 41896, 52370, 68081, 83792, 104740, 136162, 167584, 209480, 272324, 335168, 340405, 418960, 544648, 680810, 837920, 1089296, 1361620, 1675840, 2178592, 2723240, 4357184, 5446480, 10892960, 21785920]

約数ペア:

[(1, 21785920), (2, 10892960), (4, 5446480), (5, 4357184), (8, 2723240), (10, 2178592), (13, 1675840), (16, 1361620), (20, 1089296), (26, 837920), (32, 680810), (40, 544648), (52, 418960), (64, 340405), (65, 335168), (80, 272324), (104, 209480), (130, 167584), (160, 136162), (208, 104740), (260, 83792), (320, 68081), (416, 52370), (520, 41896), (832, 26185), (1040, 20948), (2080, 10474), (4160, 5237)]