21260745

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{139}}^1$

素因数の和:267

約数の個数: 64

約数和(自身を含む): 41932800

約数和(自身を除く): 20672055

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 99, 103, 135, 139, 165, 297, 309, 417, 495, 515, 695, 927, 1133, 1251, 1485, 1529, 1545, 2085, 2781, 3399, 3753, 4587, 4635, 5665, 6255, 7645, 10197, 13761, 13905, 14317, 16995, 18765, 22935, 30591, 41283, 42951, 50985, 68805, 71585, 128853, 152955, 157487, 206415, 214755, 386559, 472461, 644265, 787435, 1417383, 1932795, 2362305, 4252149, 7086915, 21260745]

約数ペア:

[(1, 21260745), (3, 7086915), (5, 4252149), (9, 2362305), (11, 1932795), (15, 1417383), (27, 787435), (33, 644265), (45, 472461), (55, 386559), (99, 214755), (103, 206415), (135, 157487), (139, 152955), (165, 128853), (297, 71585), (309, 68805), (417, 50985), (495, 42951), (515, 41283), (695, 30591), (927, 22935), (1133, 18765), (1251, 16995), (1485, 14317), (1529, 13905), (1545, 13761), (2085, 10197), (2781, 7645), (3399, 6255), (3753, 5665), (4587, 4635)]