21931415

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{677}}^1$

素因数の和:743

約数の個数: 32

約数和(自身を含む): 31242240

約数和(自身を除く): 9310825

約数列:

[1, 5, 11, 19, 31, 55, 95, 155, 209, 341, 589, 677, 1045, 1705, 2945, 3385, 6479, 7447, 12863, 20987, 32395, 37235, 64315, 104935, 141493, 230857, 398753, 707465, 1154285, 1993765, 4386283, 21931415]

約数ペア:

[(1, 21931415), (5, 4386283), (11, 1993765), (19, 1154285), (31, 707465), (55, 398753), (95, 230857), (155, 141493), (209, 104935), (341, 64315), (589, 37235), (677, 32395), (1045, 20987), (1705, 12863), (2945, 7447), (3385, 6479)]