21241840

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15619}}^1$

素因数の和:15649

約数の個数: 40

約数和(自身を含む): 52295760

約数和(自身を除く): 31053920

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15619, 31238, 62476, 78095, 124952, 156190, 249904, 265523, 312380, 531046, 624760, 1062092, 1249520, 1327615, 2124184, 2655230, 4248368, 5310460, 10620920, 21241840]

約数ペア:

[(1, 21241840), (2, 10620920), (4, 5310460), (5, 4248368), (8, 2655230), (10, 2124184), (16, 1327615), (17, 1249520), (20, 1062092), (34, 624760), (40, 531046), (68, 312380), (80, 265523), (85, 249904), (136, 156190), (170, 124952), (272, 78095), (340, 62476), (680, 31238), (1360, 15619)]