18715684

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{997}}^1$

素因数の和:1052

約数の個数: 36

約数和(自身を含む): 37263324

約数和(自身を除く): 18547640

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 247, 361, 494, 722, 988, 997, 1444, 1994, 3988, 4693, 9386, 12961, 18772, 18943, 25922, 37886, 51844, 75772, 246259, 359917, 492518, 719834, 985036, 1439668, 4678921, 9357842, 18715684]

約数ペア:

[(1, 18715684), (2, 9357842), (4, 4678921), (13, 1439668), (19, 985036), (26, 719834), (38, 492518), (52, 359917), (76, 246259), (247, 75772), (361, 51844), (494, 37886), (722, 25922), (988, 18943), (997, 18772), (1444, 12961), (1994, 9386), (3988, 4693)]