15971780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{3821}}^1$

素因数の和:3860

約数の個数: 48

約数和(自身を含む): 38525760

約数和(自身を除く): 22553980

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 2090, 3821, 4180, 7642, 15284, 19105, 38210, 42031, 72599, 76420, 84062, 145198, 168124, 210155, 290396, 362995, 420310, 725990, 798589, 840620, 1451980, 1597178, 3194356, 3992945, 7985890, 15971780]

約数ペア:

[(1, 15971780), (2, 7985890), (4, 3992945), (5, 3194356), (10, 1597178), (11, 1451980), (19, 840620), (20, 798589), (22, 725990), (38, 420310), (44, 362995), (55, 290396), (76, 210155), (95, 168124), (110, 145198), (190, 84062), (209, 76420), (220, 72599), (380, 42031), (418, 38210), (836, 19105), (1045, 15284), (2090, 7642), (3821, 4180)]