20781277425

素因数分解:

$3^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{21871}}^1$

素因数の和:22031

約数の個数: 72

約数和(自身を含む): 38501369088

約数和(自身を除く): 17720091663

約数列:

[1, 3, 5, 9, 15, 25, 41, 45, 75, 103, 123, 205, 225, 309, 369, 515, 615, 927, 1025, 1545, 1845, 2575, 3075, 4223, 4635, 7725, 9225, 12669, 21115, 21871, 23175, 38007, 63345, 65613, 105575, 109355, 190035, 196839, 316725, 328065, 546775, 896711, 950175, 984195, 1640325, 2252713, 2690133, 4483555, 4920975, 6758139, 8070399, 11263565, 13450665, 20274417, 22417775, 33790695, 40351995, 56317825, 67253325, 92361233, 101372085, 168953475, 201759975, 277083699, 461806165, 506860425, 831251097, 1385418495, 2309030825, 4156255485, 6927092475, 20781277425]

約数ペア:

[(1, 20781277425), (3, 6927092475), (5, 4156255485), (9, 2309030825), (15, 1385418495), (25, 831251097), (41, 506860425), (45, 461806165), (75, 277083699), (103, 201759975), (123, 168953475), (205, 101372085), (225, 92361233), (309, 67253325), (369, 56317825), (515, 40351995), (615, 33790695), (927, 22417775), (1025, 20274417), (1545, 13450665), (1845, 11263565), (2575, 8070399), (3075, 6758139), (4223, 4920975), (4635, 4483555), (7725, 2690133), (9225, 2252713), (12669, 1640325), (21115, 984195), (21871, 950175), (23175, 896711), (38007, 546775), (63345, 328065), (65613, 316725), (105575, 196839), (109355, 190035)]