21102016

素因数分解:

$2^6\times {\mathrm{13}}^2\times {\mathrm{1951}}^1$

素因数の和:1989

約数の個数: 42

約数和(自身を含む): 45366432

約数和(自身を除く): 24264416

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 169, 208, 338, 416, 676, 832, 1352, 1951, 2704, 3902, 5408, 7804, 10816, 15608, 25363, 31216, 50726, 62432, 101452, 124864, 202904, 329719, 405808, 659438, 811616, 1318876, 1623232, 2637752, 5275504, 10551008, 21102016]

約数ペア:

[(1, 21102016), (2, 10551008), (4, 5275504), (8, 2637752), (13, 1623232), (16, 1318876), (26, 811616), (32, 659438), (52, 405808), (64, 329719), (104, 202904), (169, 124864), (208, 101452), (338, 62432), (416, 50726), (676, 31216), (832, 25363), (1352, 15608), (1951, 10816), (2704, 7804), (3902, 5408)]