21137085

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{5399}}^1$

素因数の和:5442

約数の個数: 32

約数和(自身を含む): 38880000

約数和(自身を除く): 17742915

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 87, 135, 145, 261, 435, 783, 1305, 3915, 5399, 16197, 26995, 48591, 80985, 145773, 156571, 242955, 469713, 728865, 782855, 1409139, 2348565, 4227417, 7045695, 21137085]

約数ペア:

[(1, 21137085), (3, 7045695), (5, 4227417), (9, 2348565), (15, 1409139), (27, 782855), (29, 728865), (45, 469713), (87, 242955), (135, 156571), (145, 145773), (261, 80985), (435, 48591), (783, 26995), (1305, 16197), (3915, 5399)]