21660825

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{433}}^1$

素因数の和:498

約数の個数: 48

約数和(自身を含む): 38747520

約数和(自身を除く): 17086695

約数列:

[1, 3, 5, 15, 23, 25, 29, 69, 75, 87, 115, 145, 345, 433, 435, 575, 667, 725, 1299, 1725, 2001, 2165, 2175, 3335, 6495, 9959, 10005, 10825, 12557, 16675, 29877, 32475, 37671, 49795, 50025, 62785, 149385, 188355, 248975, 288811, 313925, 746925, 866433, 941775, 1444055, 4332165, 7220275, 21660825]

約数ペア:

[(1, 21660825), (3, 7220275), (5, 4332165), (15, 1444055), (23, 941775), (25, 866433), (29, 746925), (69, 313925), (75, 288811), (87, 248975), (115, 188355), (145, 149385), (345, 62785), (433, 50025), (435, 49795), (575, 37671), (667, 32475), (725, 29877), (1299, 16675), (1725, 12557), (2001, 10825), (2165, 10005), (2175, 9959), (3335, 6495)]