21329645

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{29}}^1\times {\mathrm{509}}^1$

素因数の和:577

約数の個数: 24

約数和(自身を含む): 28182600

約数和(自身を除く): 6852955

約数列:

[1, 5, 17, 29, 85, 145, 289, 493, 509, 1445, 2465, 2545, 8381, 8653, 14761, 41905, 43265, 73805, 147101, 250937, 735505, 1254685, 4265929, 21329645]

約数ペア:

[(1, 21329645), (5, 4265929), (17, 1254685), (29, 735505), (85, 250937), (145, 147101), (289, 73805), (493, 43265), (509, 41905), (1445, 14761), (2465, 8653), (2545, 8381)]