20457780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{727}}^1$

素因数の和:813

約数の個数: 96

約数和(自身を含む): 66533376

約数和(自身を除く): 46075596

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 67, 70, 84, 105, 134, 140, 201, 210, 268, 335, 402, 420, 469, 670, 727, 804, 938, 1005, 1340, 1407, 1454, 1876, 2010, 2181, 2345, 2814, 2908, 3635, 4020, 4362, 4690, 5089, 5628, 7035, 7270, 8724, 9380, 10178, 10905, 14070, 14540, 15267, 20356, 21810, 25445, 28140, 30534, 43620, 48709, 50890, 61068, 76335, 97418, 101780, 146127, 152670, 194836, 243545, 292254, 305340, 340963, 487090, 584508, 681926, 730635, 974180, 1022889, 1363852, 1461270, 1704815, 2045778, 2922540, 3409630, 4091556, 5114445, 6819260, 10228890, 20457780]

約数ペア:

[(1, 20457780), (2, 10228890), (3, 6819260), (4, 5114445), (5, 4091556), (6, 3409630), (7, 2922540), (10, 2045778), (12, 1704815), (14, 1461270), (15, 1363852), (20, 1022889), (21, 974180), (28, 730635), (30, 681926), (35, 584508), (42, 487090), (60, 340963), (67, 305340), (70, 292254), (84, 243545), (105, 194836), (134, 152670), (140, 146127), (201, 101780), (210, 97418), (268, 76335), (335, 61068), (402, 50890), (420, 48709), (469, 43620), (670, 30534), (727, 28140), (804, 25445), (938, 21810), (1005, 20356), (1340, 15267), (1407, 14540), (1454, 14070), (1876, 10905), (2010, 10178), (2181, 9380), (2345, 8724), (2814, 7270), (2908, 7035), (3635, 5628), (4020, 5089), (4362, 4690)]