21111620

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{2003}}^1$

素因数の和:2060

約数の個数: 48

約数和(自身を含む): 48480768

約数和(自身を除く): 27369148

約数列:

[1, 2, 4, 5, 10, 17, 20, 31, 34, 62, 68, 85, 124, 155, 170, 310, 340, 527, 620, 1054, 2003, 2108, 2635, 4006, 5270, 8012, 10015, 10540, 20030, 34051, 40060, 62093, 68102, 124186, 136204, 170255, 248372, 310465, 340510, 620930, 681020, 1055581, 1241860, 2111162, 4222324, 5277905, 10555810, 21111620]

約数ペア:

[(1, 21111620), (2, 10555810), (4, 5277905), (5, 4222324), (10, 2111162), (17, 1241860), (20, 1055581), (31, 681020), (34, 620930), (62, 340510), (68, 310465), (85, 248372), (124, 170255), (155, 136204), (170, 124186), (310, 68102), (340, 62093), (527, 40060), (620, 34051), (1054, 20030), (2003, 10540), (2108, 10015), (2635, 8012), (4006, 5270)]