21000816736

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{734911}}^1$

素因数の和:734987

約数の個数: 48

約数和(自身を含む): 44447477760

約数和(自身を除く): 23446661024

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 47, 76, 94, 152, 188, 304, 376, 608, 752, 893, 1504, 1786, 3572, 7144, 14288, 28576, 734911, 1469822, 2939644, 5879288, 11758576, 13963309, 23517152, 27926618, 34540817, 55853236, 69081634, 111706472, 138163268, 223412944, 276326536, 446825888, 552653072, 656275523, 1105306144, 1312551046, 2625102092, 5250204184, 10500408368, 21000816736]

約数ペア:

[(1, 21000816736), (2, 10500408368), (4, 5250204184), (8, 2625102092), (16, 1312551046), (19, 1105306144), (32, 656275523), (38, 552653072), (47, 446825888), (76, 276326536), (94, 223412944), (152, 138163268), (188, 111706472), (304, 69081634), (376, 55853236), (608, 34540817), (752, 27926618), (893, 23517152), (1504, 13963309), (1786, 11758576), (3572, 5879288), (7144, 2939644), (14288, 1469822), (28576, 734911)]