21478288

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{3331}}^1$

素因数の和:3383

約数の個数: 40

約数和(自身を含む): 46274816

約数和(自身を除く): 24796528

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 52, 62, 104, 124, 208, 248, 403, 496, 806, 1612, 3224, 3331, 6448, 6662, 13324, 26648, 43303, 53296, 86606, 103261, 173212, 206522, 346424, 413044, 692848, 826088, 1342393, 1652176, 2684786, 5369572, 10739144, 21478288]

約数ペア:

[(1, 21478288), (2, 10739144), (4, 5369572), (8, 2684786), (13, 1652176), (16, 1342393), (26, 826088), (31, 692848), (52, 413044), (62, 346424), (104, 206522), (124, 173212), (208, 103261), (248, 86606), (403, 53296), (496, 43303), (806, 26648), (1612, 13324), (3224, 6662), (3331, 6448)]