21017895

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{2543}}^1$

素因数の和:2599

約数の個数: 32

約数和(自身を含む): 36633600

約数和(自身を除く): 15615705

約数列:

[1, 3, 5, 15, 19, 29, 57, 87, 95, 145, 285, 435, 551, 1653, 2543, 2755, 7629, 8265, 12715, 38145, 48317, 73747, 144951, 221241, 241585, 368735, 724755, 1106205, 1401193, 4203579, 7005965, 21017895]

約数ペア:

[(1, 21017895), (3, 7005965), (5, 4203579), (15, 1401193), (19, 1106205), (29, 724755), (57, 368735), (87, 241585), (95, 221241), (145, 144951), (285, 73747), (435, 48317), (551, 38145), (1653, 12715), (2543, 8265), (2755, 7629)]