20797520

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{127}}^1$

素因数の和:252

約数の個数: 80

約数和(自身を含む): 51425280

約数和(自身を除く): 30627760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 89, 92, 115, 127, 178, 184, 230, 254, 356, 368, 445, 460, 508, 635, 712, 890, 920, 1016, 1270, 1424, 1780, 1840, 2032, 2047, 2540, 2921, 3560, 4094, 5080, 5842, 7120, 8188, 10160, 10235, 11303, 11684, 14605, 16376, 20470, 22606, 23368, 29210, 32752, 40940, 45212, 46736, 56515, 58420, 81880, 90424, 113030, 116840, 163760, 180848, 226060, 233680, 259969, 452120, 519938, 904240, 1039876, 1299845, 2079752, 2599690, 4159504, 5199380, 10398760, 20797520]

約数ペア:

[(1, 20797520), (2, 10398760), (4, 5199380), (5, 4159504), (8, 2599690), (10, 2079752), (16, 1299845), (20, 1039876), (23, 904240), (40, 519938), (46, 452120), (80, 259969), (89, 233680), (92, 226060), (115, 180848), (127, 163760), (178, 116840), (184, 113030), (230, 90424), (254, 81880), (356, 58420), (368, 56515), (445, 46736), (460, 45212), (508, 40940), (635, 32752), (712, 29210), (890, 23368), (920, 22606), (1016, 20470), (1270, 16376), (1424, 14605), (1780, 11684), (1840, 11303), (2032, 10235), (2047, 10160), (2540, 8188), (2921, 7120), (3560, 5842), (4094, 5080)]