18734456

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{499}}^1$

素因数の和:556

約数の個数: 48

約数和(自身を含む): 40005000

約数和(自身を除く): 21270544

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 52, 76, 104, 152, 247, 361, 494, 499, 722, 988, 998, 1444, 1976, 1996, 2888, 3992, 4693, 6487, 9386, 9481, 12974, 18772, 18962, 25948, 37544, 37924, 51896, 75848, 123253, 180139, 246506, 360278, 493012, 720556, 986024, 1441112, 2341807, 4683614, 9367228, 18734456]

約数ペア:

[(1, 18734456), (2, 9367228), (4, 4683614), (8, 2341807), (13, 1441112), (19, 986024), (26, 720556), (38, 493012), (52, 360278), (76, 246506), (104, 180139), (152, 123253), (247, 75848), (361, 51896), (494, 37924), (499, 37544), (722, 25948), (988, 18962), (998, 18772), (1444, 12974), (1976, 9481), (1996, 9386), (2888, 6487), (3992, 4693)]