20513948

素因数分解:

$2^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{97}}^1$

素因数の和:211

約数の個数: 72

約数和(自身を含む): 45983952

約数和(自身を除く): 25470004

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 49, 52, 83, 91, 97, 98, 166, 182, 194, 196, 332, 364, 388, 581, 637, 679, 1079, 1162, 1261, 1274, 1358, 2158, 2324, 2522, 2548, 2716, 4067, 4316, 4753, 5044, 7553, 8051, 8134, 8827, 9506, 15106, 16102, 16268, 17654, 19012, 30212, 32204, 35308, 52871, 56357, 61789, 104663, 105742, 112714, 123578, 209326, 211484, 225428, 247156, 394499, 418652, 732641, 788998, 1465282, 1577996, 2930564, 5128487, 10256974, 20513948]

約数ペア:

[(1, 20513948), (2, 10256974), (4, 5128487), (7, 2930564), (13, 1577996), (14, 1465282), (26, 788998), (28, 732641), (49, 418652), (52, 394499), (83, 247156), (91, 225428), (97, 211484), (98, 209326), (166, 123578), (182, 112714), (194, 105742), (196, 104663), (332, 61789), (364, 56357), (388, 52871), (581, 35308), (637, 32204), (679, 30212), (1079, 19012), (1162, 17654), (1261, 16268), (1274, 16102), (1358, 15106), (2158, 9506), (2324, 8827), (2522, 8134), (2548, 8051), (2716, 7553), (4067, 5044), (4316, 4753)]