20537480

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{443}}^1$

素因数の和:534

約数の個数: 64

約数和(自身を含む): 49550400

約数和(自身を除く): 29012920

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 61, 76, 95, 122, 152, 190, 244, 305, 380, 443, 488, 610, 760, 886, 1159, 1220, 1772, 2215, 2318, 2440, 3544, 4430, 4636, 5795, 8417, 8860, 9272, 11590, 16834, 17720, 23180, 27023, 33668, 42085, 46360, 54046, 67336, 84170, 108092, 135115, 168340, 216184, 270230, 336680, 513437, 540460, 1026874, 1080920, 2053748, 2567185, 4107496, 5134370, 10268740, 20537480]

約数ペア:

[(1, 20537480), (2, 10268740), (4, 5134370), (5, 4107496), (8, 2567185), (10, 2053748), (19, 1080920), (20, 1026874), (38, 540460), (40, 513437), (61, 336680), (76, 270230), (95, 216184), (122, 168340), (152, 135115), (190, 108092), (244, 84170), (305, 67336), (380, 54046), (443, 46360), (488, 42085), (610, 33668), (760, 27023), (886, 23180), (1159, 17720), (1220, 16834), (1772, 11590), (2215, 9272), (2318, 8860), (2440, 8417), (3544, 5795), (4430, 4636)]