21462500

素因数分解:

$2^2\times 5^5\times {\mathrm{17}}^1\times {\mathrm{101}}^1$

素因数の和:147

約数の個数: 72

約数和(自身を含む): 50199912

約数和(自身を除く): 28737412

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 50, 68, 85, 100, 101, 125, 170, 202, 250, 340, 404, 425, 500, 505, 625, 850, 1010, 1250, 1700, 1717, 2020, 2125, 2500, 2525, 3125, 3434, 4250, 5050, 6250, 6868, 8500, 8585, 10100, 10625, 12500, 12625, 17170, 21250, 25250, 34340, 42500, 42925, 50500, 53125, 63125, 85850, 106250, 126250, 171700, 212500, 214625, 252500, 315625, 429250, 631250, 858500, 1073125, 1262500, 2146250, 4292500, 5365625, 10731250, 21462500]

約数ペア:

[(1, 21462500), (2, 10731250), (4, 5365625), (5, 4292500), (10, 2146250), (17, 1262500), (20, 1073125), (25, 858500), (34, 631250), (50, 429250), (68, 315625), (85, 252500), (100, 214625), (101, 212500), (125, 171700), (170, 126250), (202, 106250), (250, 85850), (340, 63125), (404, 53125), (425, 50500), (500, 42925), (505, 42500), (625, 34340), (850, 25250), (1010, 21250), (1250, 17170), (1700, 12625), (1717, 12500), (2020, 10625), (2125, 10100), (2500, 8585), (2525, 8500), (3125, 6868), (3434, 6250), (4250, 5050)]