21025725

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{1381}}^1$

素因数の和:1430

約数の個数: 48

約数和(自身を含む): 41128320

約数和(自身を除く): 20102595

約数列:

[1, 3, 5, 7, 15, 21, 25, 29, 35, 75, 87, 105, 145, 175, 203, 435, 525, 609, 725, 1015, 1381, 2175, 3045, 4143, 5075, 6905, 9667, 15225, 20715, 29001, 34525, 40049, 48335, 103575, 120147, 145005, 200245, 241675, 280343, 600735, 725025, 841029, 1001225, 1401715, 3003675, 4205145, 7008575, 21025725]

約数ペア:

[(1, 21025725), (3, 7008575), (5, 4205145), (7, 3003675), (15, 1401715), (21, 1001225), (25, 841029), (29, 725025), (35, 600735), (75, 280343), (87, 241675), (105, 200245), (145, 145005), (175, 120147), (203, 103575), (435, 48335), (525, 40049), (609, 34525), (725, 29001), (1015, 20715), (1381, 15225), (2175, 9667), (3045, 6905), (4143, 5075)]