20512781555

素因数分解:

$5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{127}}^2\times {\mathrm{179}}^1$

素因数の和:481

約数の個数: 72

約数和(自身を含む): 30023427600

約数和(自身を除く): 9510646045

約数列:

[1, 5, 7, 29, 35, 49, 127, 145, 179, 203, 245, 635, 889, 895, 1015, 1253, 1421, 3683, 4445, 5191, 6223, 6265, 7105, 8771, 16129, 18415, 22733, 25781, 25955, 31115, 36337, 43855, 80645, 112903, 113665, 128905, 159131, 180467, 181685, 254359, 467741, 564515, 659257, 790321, 795655, 902335, 1113917, 1271795, 2338705, 2887091, 3274187, 3296285, 3951605, 4614799, 5569585, 14435455, 16370935, 20209637, 22919309, 23073995, 32303593, 83725639, 101048185, 114596545, 141467459, 161517965, 418628195, 586079473, 707337295, 2930397365, 4102556311, 20512781555]

約数ペア:

[(1, 20512781555), (5, 4102556311), (7, 2930397365), (29, 707337295), (35, 586079473), (49, 418628195), (127, 161517965), (145, 141467459), (179, 114596545), (203, 101048185), (245, 83725639), (635, 32303593), (889, 23073995), (895, 22919309), (1015, 20209637), (1253, 16370935), (1421, 14435455), (3683, 5569585), (4445, 4614799), (5191, 3951605), (6223, 3296285), (6265, 3274187), (7105, 2887091), (8771, 2338705), (16129, 1271795), (18415, 1113917), (22733, 902335), (25781, 795655), (25955, 790321), (31115, 659257), (36337, 564515), (43855, 467741), (80645, 254359), (112903, 181685), (113665, 180467), (128905, 159131)]