21805900

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{127}}^1$

素因数の和:259

約数の個数: 72

約数和(自身を含む): 50996736

約数和(自身を除く): 29190836

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 50, 68, 85, 100, 101, 127, 170, 202, 254, 340, 404, 425, 505, 508, 635, 850, 1010, 1270, 1700, 1717, 2020, 2159, 2525, 2540, 3175, 3434, 4318, 5050, 6350, 6868, 8585, 8636, 10100, 10795, 12700, 12827, 17170, 21590, 25654, 34340, 42925, 43180, 51308, 53975, 64135, 85850, 107950, 128270, 171700, 215900, 218059, 256540, 320675, 436118, 641350, 872236, 1090295, 1282700, 2180590, 4361180, 5451475, 10902950, 21805900]

約数ペア:

[(1, 21805900), (2, 10902950), (4, 5451475), (5, 4361180), (10, 2180590), (17, 1282700), (20, 1090295), (25, 872236), (34, 641350), (50, 436118), (68, 320675), (85, 256540), (100, 218059), (101, 215900), (127, 171700), (170, 128270), (202, 107950), (254, 85850), (340, 64135), (404, 53975), (425, 51308), (505, 43180), (508, 42925), (635, 34340), (850, 25654), (1010, 21590), (1270, 17170), (1700, 12827), (1717, 12700), (2020, 10795), (2159, 10100), (2525, 8636), (2540, 8585), (3175, 6868), (3434, 6350), (4318, 5050)]