21001188

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{7919}}^1$

素因数の和:7956

約数の個数: 48

約数和(自身を含む): 55883520

約数和(自身を除く): 34882332

約数列:

[1, 2, 3, 4, 6, 12, 13, 17, 26, 34, 39, 51, 52, 68, 78, 102, 156, 204, 221, 442, 663, 884, 1326, 2652, 7919, 15838, 23757, 31676, 47514, 95028, 102947, 134623, 205894, 269246, 308841, 403869, 411788, 538492, 617682, 807738, 1235364, 1615476, 1750099, 3500198, 5250297, 7000396, 10500594, 21001188]

約数ペア:

[(1, 21001188), (2, 10500594), (3, 7000396), (4, 5250297), (6, 3500198), (12, 1750099), (13, 1615476), (17, 1235364), (26, 807738), (34, 617682), (39, 538492), (51, 411788), (52, 403869), (68, 308841), (78, 269246), (102, 205894), (156, 134623), (204, 102947), (221, 95028), (442, 47514), (663, 31676), (884, 23757), (1326, 15838), (2652, 7919)]