20921650

素因数分解:

$2^1\times 5^2\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{263}}^1$

素因数の和:355

約数の個数: 48

約数和(自身を含む): 41050944

約数和(自身を除く): 20129294

約数列:

[1, 2, 5, 10, 25, 37, 43, 50, 74, 86, 185, 215, 263, 370, 430, 526, 925, 1075, 1315, 1591, 1850, 2150, 2630, 3182, 6575, 7955, 9731, 11309, 13150, 15910, 19462, 22618, 39775, 48655, 56545, 79550, 97310, 113090, 243275, 282725, 418433, 486550, 565450, 836866, 2092165, 4184330, 10460825, 20921650]

約数ペア:

[(1, 20921650), (2, 10460825), (5, 4184330), (10, 2092165), (25, 836866), (37, 565450), (43, 486550), (50, 418433), (74, 282725), (86, 243275), (185, 113090), (215, 97310), (263, 79550), (370, 56545), (430, 48655), (526, 39775), (925, 22618), (1075, 19462), (1315, 15910), (1591, 13150), (1850, 11309), (2150, 9731), (2630, 7955), (3182, 6575)]