20984210

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{127}}^1$

素因数の和:219

約数の個数: 64

約数和(自身を含む): 43352064

約数和(自身を除く): 22367854

約数列:

[1, 2, 5, 10, 13, 26, 31, 41, 62, 65, 82, 127, 130, 155, 205, 254, 310, 403, 410, 533, 635, 806, 1066, 1270, 1271, 1651, 2015, 2542, 2665, 3302, 3937, 4030, 5207, 5330, 6355, 7874, 8255, 10414, 12710, 16510, 16523, 19685, 26035, 33046, 39370, 51181, 52070, 67691, 82615, 102362, 135382, 161417, 165230, 255905, 322834, 338455, 511810, 676910, 807085, 1614170, 2098421, 4196842, 10492105, 20984210]

約数ペア:

[(1, 20984210), (2, 10492105), (5, 4196842), (10, 2098421), (13, 1614170), (26, 807085), (31, 676910), (41, 511810), (62, 338455), (65, 322834), (82, 255905), (127, 165230), (130, 161417), (155, 135382), (205, 102362), (254, 82615), (310, 67691), (403, 52070), (410, 51181), (533, 39370), (635, 33046), (806, 26035), (1066, 19685), (1270, 16523), (1271, 16510), (1651, 12710), (2015, 10414), (2542, 8255), (2665, 7874), (3302, 6355), (3937, 5330), (4030, 5207)]