21528728

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{1511}}^1$

素因数の和:1667

約数の個数: 32

約数和(自身を含む): 43817760

約数和(自身を除く): 22289032

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 137, 274, 548, 1096, 1511, 1781, 3022, 3562, 6044, 7124, 12088, 14248, 19643, 39286, 78572, 157144, 207007, 414014, 828028, 1656056, 2691091, 5382182, 10764364, 21528728]

約数ペア:

[(1, 21528728), (2, 10764364), (4, 5382182), (8, 2691091), (13, 1656056), (26, 828028), (52, 414014), (104, 207007), (137, 157144), (274, 78572), (548, 39286), (1096, 19643), (1511, 14248), (1781, 12088), (3022, 7124), (3562, 6044)]