21821775

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{127}}^1$

素因数の和:248

約数の個数: 48

約数和(自身を含む): 38092800

約数和(自身を除く): 16271025

約数列:

[1, 3, 5, 15, 25, 29, 75, 79, 87, 127, 145, 237, 381, 395, 435, 635, 725, 1185, 1905, 1975, 2175, 2291, 3175, 3683, 5925, 6873, 9525, 10033, 11049, 11455, 18415, 30099, 34365, 50165, 55245, 57275, 92075, 150495, 171825, 250825, 276225, 290957, 752475, 872871, 1454785, 4364355, 7273925, 21821775]

約数ペア:

[(1, 21821775), (3, 7273925), (5, 4364355), (15, 1454785), (25, 872871), (29, 752475), (75, 290957), (79, 276225), (87, 250825), (127, 171825), (145, 150495), (237, 92075), (381, 57275), (395, 55245), (435, 50165), (635, 34365), (725, 30099), (1185, 18415), (1905, 11455), (1975, 11049), (2175, 10033), (2291, 9525), (3175, 6873), (3683, 5925)]