20805921880

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{282229}}^1$

素因数の和:282356

約数の個数: 64

約数和(自身を含む): 49785372000

約数和(自身を除く): 28979450120

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 97, 152, 190, 194, 380, 388, 485, 760, 776, 970, 1843, 1940, 3686, 3880, 7372, 9215, 14744, 18430, 36860, 73720, 282229, 564458, 1128916, 1411145, 2257832, 2822290, 5362351, 5644580, 10724702, 11289160, 21449404, 26811755, 27376213, 42898808, 53623510, 54752426, 107247020, 109504852, 136881065, 214494040, 219009704, 273762130, 520148047, 547524260, 1040296094, 1095048520, 2080592188, 2600740235, 4161184376, 5201480470, 10402960940, 20805921880]

約数ペア:

[(1, 20805921880), (2, 10402960940), (4, 5201480470), (5, 4161184376), (8, 2600740235), (10, 2080592188), (19, 1095048520), (20, 1040296094), (38, 547524260), (40, 520148047), (76, 273762130), (95, 219009704), (97, 214494040), (152, 136881065), (190, 109504852), (194, 107247020), (380, 54752426), (388, 53623510), (485, 42898808), (760, 27376213), (776, 26811755), (970, 21449404), (1843, 11289160), (1940, 10724702), (3686, 5644580), (3880, 5362351), (7372, 2822290), (9215, 2257832), (14744, 1411145), (18430, 1128916), (36860, 564458), (73720, 282229)]