21617540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{293}}^1$

素因数の和:357

約数の個数: 96

約数和(自身を含む): 56899584

約数和(自身を除く): 35282044

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 31, 34, 35, 62, 68, 70, 85, 119, 124, 140, 155, 170, 217, 238, 293, 310, 340, 434, 476, 527, 586, 595, 620, 868, 1054, 1085, 1172, 1190, 1465, 2051, 2108, 2170, 2380, 2635, 2930, 3689, 4102, 4340, 4981, 5270, 5860, 7378, 8204, 9083, 9962, 10255, 10540, 14756, 18166, 18445, 19924, 20510, 24905, 34867, 36332, 36890, 41020, 45415, 49810, 63581, 69734, 73780, 90830, 99620, 127162, 139468, 154411, 174335, 181660, 254324, 308822, 317905, 348670, 617644, 635810, 697340, 772055, 1080877, 1271620, 1544110, 2161754, 3088220, 4323508, 5404385, 10808770, 21617540]

約数ペア:

[(1, 21617540), (2, 10808770), (4, 5404385), (5, 4323508), (7, 3088220), (10, 2161754), (14, 1544110), (17, 1271620), (20, 1080877), (28, 772055), (31, 697340), (34, 635810), (35, 617644), (62, 348670), (68, 317905), (70, 308822), (85, 254324), (119, 181660), (124, 174335), (140, 154411), (155, 139468), (170, 127162), (217, 99620), (238, 90830), (293, 73780), (310, 69734), (340, 63581), (434, 49810), (476, 45415), (527, 41020), (586, 36890), (595, 36332), (620, 34867), (868, 24905), (1054, 20510), (1085, 19924), (1172, 18445), (1190, 18166), (1465, 14756), (2051, 10540), (2108, 10255), (2170, 9962), (2380, 9083), (2635, 8204), (2930, 7378), (3689, 5860), (4102, 5270), (4340, 4981)]