80405720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{2251}}^1$

素因数の和:2328

約数の個数: 64

約数和(自身を含む): 194572800

約数和(自身を除く): 114167080

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 47, 76, 94, 95, 152, 188, 190, 235, 376, 380, 470, 760, 893, 940, 1786, 1880, 2251, 3572, 4465, 4502, 7144, 8930, 9004, 11255, 17860, 18008, 22510, 35720, 42769, 45020, 85538, 90040, 105797, 171076, 211594, 213845, 342152, 423188, 427690, 528985, 846376, 855380, 1057970, 1710760, 2010143, 2115940, 4020286, 4231880, 8040572, 10050715, 16081144, 20101430, 40202860, 80405720]

約数ペア:

[(1, 80405720), (2, 40202860), (4, 20101430), (5, 16081144), (8, 10050715), (10, 8040572), (19, 4231880), (20, 4020286), (38, 2115940), (40, 2010143), (47, 1710760), (76, 1057970), (94, 855380), (95, 846376), (152, 528985), (188, 427690), (190, 423188), (235, 342152), (376, 213845), (380, 211594), (470, 171076), (760, 105797), (893, 90040), (940, 85538), (1786, 45020), (1880, 42769), (2251, 35720), (3572, 22510), (4465, 18008), (4502, 17860), (7144, 11255), (8930, 9004)]