20917480

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1619}}^1$

素因数の和:1666

約数の個数: 64

約数和(自身を含む): 52488000

約数和(自身を除く): 31570520

約数列:

[1, 2, 4, 5, 8, 10, 17, 19, 20, 34, 38, 40, 68, 76, 85, 95, 136, 152, 170, 190, 323, 340, 380, 646, 680, 760, 1292, 1615, 1619, 2584, 3230, 3238, 6460, 6476, 8095, 12920, 12952, 16190, 27523, 30761, 32380, 55046, 61522, 64760, 110092, 123044, 137615, 153805, 220184, 246088, 275230, 307610, 522937, 550460, 615220, 1045874, 1100920, 1230440, 2091748, 2614685, 4183496, 5229370, 10458740, 20917480]

約数ペア:

[(1, 20917480), (2, 10458740), (4, 5229370), (5, 4183496), (8, 2614685), (10, 2091748), (17, 1230440), (19, 1100920), (20, 1045874), (34, 615220), (38, 550460), (40, 522937), (68, 307610), (76, 275230), (85, 246088), (95, 220184), (136, 153805), (152, 137615), (170, 123044), (190, 110092), (323, 64760), (340, 61522), (380, 55046), (646, 32380), (680, 30761), (760, 27523), (1292, 16190), (1615, 12952), (1619, 12920), (2584, 8095), (3230, 6476), (3238, 6460)]