21206635

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1$

素因数の和:195

約数の個数: 32

約数和(自身を含む): 27869184

約数和(自身を除く): 6662549

約数列:

[1, 5, 31, 41, 47, 71, 155, 205, 235, 355, 1271, 1457, 1927, 2201, 2911, 3337, 6355, 7285, 9635, 11005, 14555, 16685, 59737, 90241, 103447, 136817, 298685, 451205, 517235, 684085, 4241327, 21206635]

約数ペア:

[(1, 21206635), (5, 4241327), (31, 684085), (41, 517235), (47, 451205), (71, 298685), (155, 136817), (205, 103447), (235, 90241), (355, 59737), (1271, 16685), (1457, 14555), (1927, 11005), (2201, 9635), (2911, 7285), (3337, 6355)]