19948990

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{2729}}^1$

素因数の和:2796

約数の個数: 32

約数和(自身を含む): 38918880

約数和(自身を除く): 18969890

約数列:

[1, 2, 5, 10, 17, 34, 43, 85, 86, 170, 215, 430, 731, 1462, 2729, 3655, 5458, 7310, 13645, 27290, 46393, 92786, 117347, 231965, 234694, 463930, 586735, 1173470, 1994899, 3989798, 9974495, 19948990]

約数ペア:

[(1, 19948990), (2, 9974495), (5, 3989798), (10, 1994899), (17, 1173470), (34, 586735), (43, 463930), (85, 234694), (86, 231965), (170, 117347), (215, 92786), (430, 46393), (731, 27290), (1462, 13645), (2729, 7310), (3655, 5458)]