21298275

素因数分解:

$3^3\times 5^2\times {\mathrm{139}}^1\times {\mathrm{227}}^1$

素因数の和:385

約数の個数: 48

約数和(自身を含む): 39580800

約数和(自身を除く): 18282525

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 135, 139, 225, 227, 417, 675, 681, 695, 1135, 1251, 2043, 2085, 3405, 3475, 3753, 5675, 6129, 6255, 10215, 10425, 17025, 18765, 30645, 31275, 31553, 51075, 93825, 94659, 153225, 157765, 283977, 473295, 788825, 851931, 1419885, 2366475, 4259655, 7099425, 21298275]

約数ペア:

[(1, 21298275), (3, 7099425), (5, 4259655), (9, 2366475), (15, 1419885), (25, 851931), (27, 788825), (45, 473295), (75, 283977), (135, 157765), (139, 153225), (225, 94659), (227, 93825), (417, 51075), (675, 31553), (681, 31275), (695, 30645), (1135, 18765), (1251, 17025), (2043, 10425), (2085, 10215), (3405, 6255), (3475, 6129), (3753, 5675)]