21241905

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{1021}}^1$

素因数の和:1121

約数の個数: 32

約数和(自身を含む): 36301440

約数和(自身を除く): 15059535

約数列:

[1, 3, 5, 15, 19, 57, 73, 95, 219, 285, 365, 1021, 1095, 1387, 3063, 4161, 5105, 6935, 15315, 19399, 20805, 58197, 74533, 96995, 223599, 290985, 372665, 1117995, 1416127, 4248381, 7080635, 21241905]

約数ペア:

[(1, 21241905), (3, 7080635), (5, 4248381), (15, 1416127), (19, 1117995), (57, 372665), (73, 290985), (95, 223599), (219, 96995), (285, 74533), (365, 58197), (1021, 20805), (1095, 19399), (1387, 15315), (3063, 6935), (4161, 5105)]