21715645

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{307}}^1$

素因数の和:409

約数の個数: 32

約数和(自身を含む): 31223808

約数和(自身を除く): 9508163

約数列:

[1, 5, 7, 35, 43, 47, 215, 235, 301, 307, 329, 1505, 1535, 1645, 2021, 2149, 10105, 10745, 13201, 14147, 14429, 66005, 70735, 72145, 92407, 101003, 462035, 505015, 620447, 3102235, 4343129, 21715645]

約数ペア:

[(1, 21715645), (5, 4343129), (7, 3102235), (35, 620447), (43, 505015), (47, 462035), (215, 101003), (235, 92407), (301, 72145), (307, 70735), (329, 66005), (1505, 14429), (1535, 14147), (1645, 13201), (2021, 10745), (2149, 10105)]