19677380

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{127}}^2$

素因数の和:324

約数の個数: 36

約数和(自身を含む): 42333228

約数和(自身を除く): 22655848

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 127, 244, 254, 305, 508, 610, 635, 1220, 1270, 2540, 7747, 15494, 16129, 30988, 32258, 38735, 64516, 77470, 80645, 154940, 161290, 322580, 983869, 1967738, 3935476, 4919345, 9838690, 19677380]

約数ペア:

[(1, 19677380), (2, 9838690), (4, 4919345), (5, 3935476), (10, 1967738), (20, 983869), (61, 322580), (122, 161290), (127, 154940), (244, 80645), (254, 77470), (305, 64516), (508, 38735), (610, 32258), (635, 30988), (1220, 16129), (1270, 15494), (2540, 7747)]