20921318495

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{181}}^1\times {\mathrm{4481}}^1$

素因数の和:4752

約数の個数: 64

約数和(自身を含む): 31950277632

約数和(自身を除く): 11028959137

約数列:

[1, 5, 7, 11, 35, 55, 67, 77, 181, 335, 385, 469, 737, 905, 1267, 1991, 2345, 3685, 4481, 5159, 6335, 9955, 12127, 13937, 22405, 25795, 31367, 49291, 60635, 69685, 84889, 133397, 156835, 246455, 300227, 345037, 424445, 666985, 811061, 933779, 1501135, 1725185, 2101589, 3302497, 4055305, 4668895, 5677427, 8921671, 10507945, 16512485, 23117479, 28387135, 44608355, 54341087, 62451697, 115587395, 271705435, 312258485, 380387609, 597751957, 1901938045, 2988759785, 4184263699, 20921318495]

約数ペア:

[(1, 20921318495), (5, 4184263699), (7, 2988759785), (11, 1901938045), (35, 597751957), (55, 380387609), (67, 312258485), (77, 271705435), (181, 115587395), (335, 62451697), (385, 54341087), (469, 44608355), (737, 28387135), (905, 23117479), (1267, 16512485), (1991, 10507945), (2345, 8921671), (3685, 5677427), (4481, 4668895), (5159, 4055305), (6335, 3302497), (9955, 2101589), (12127, 1725185), (13937, 1501135), (22405, 933779), (25795, 811061), (31367, 666985), (49291, 424445), (60635, 345037), (69685, 300227), (84889, 246455), (133397, 156835)]