189720620

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{9871}}^1$

素因数の和:9942

約数の個数: 36

約数和(自身を含む): 411721632

約数和(自身を除く): 222001012

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 961, 1922, 3844, 4805, 9610, 9871, 19220, 19742, 39484, 49355, 98710, 197420, 306001, 612002, 1224004, 1530005, 3060010, 6120020, 9486031, 18972062, 37944124, 47430155, 94860310, 189720620]

約数ペア:

[(1, 189720620), (2, 94860310), (4, 47430155), (5, 37944124), (10, 18972062), (20, 9486031), (31, 6120020), (62, 3060010), (124, 1530005), (155, 1224004), (310, 612002), (620, 306001), (961, 197420), (1922, 98710), (3844, 49355), (4805, 39484), (9610, 19742), (9871, 19220)]