20555990

素因数分解:

$2^1\times 5^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{461}}^1$

素因数の和:502

約数の個数: 64

約数和(自身を含む): 46569600

約数和(自身を除く): 26013610

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 49, 65, 70, 91, 98, 130, 182, 245, 343, 455, 461, 490, 637, 686, 910, 922, 1274, 1715, 2305, 3185, 3227, 3430, 4459, 4610, 5993, 6370, 6454, 8918, 11986, 16135, 22295, 22589, 29965, 32270, 41951, 44590, 45178, 59930, 83902, 112945, 158123, 209755, 225890, 293657, 316246, 419510, 587314, 790615, 1468285, 1581230, 2055599, 2936570, 4111198, 10277995, 20555990]

約数ペア:

[(1, 20555990), (2, 10277995), (5, 4111198), (7, 2936570), (10, 2055599), (13, 1581230), (14, 1468285), (26, 790615), (35, 587314), (49, 419510), (65, 316246), (70, 293657), (91, 225890), (98, 209755), (130, 158123), (182, 112945), (245, 83902), (343, 59930), (455, 45178), (461, 44590), (490, 41951), (637, 32270), (686, 29965), (910, 22589), (922, 22295), (1274, 16135), (1715, 11986), (2305, 8918), (3185, 6454), (3227, 6370), (3430, 5993), (4459, 4610)]