81734840

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{431}}^2$

素因数の和:884

約数の個数: 48

約数和(自身を含む): 201088440

約数和(自身を除く): 119353600

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 431, 440, 862, 1724, 2155, 3448, 4310, 4741, 8620, 9482, 17240, 18964, 23705, 37928, 47410, 94820, 185761, 189640, 371522, 743044, 928805, 1486088, 1857610, 2043371, 3715220, 4086742, 7430440, 8173484, 10216855, 16346968, 20433710, 40867420, 81734840]

約数ペア:

[(1, 81734840), (2, 40867420), (4, 20433710), (5, 16346968), (8, 10216855), (10, 8173484), (11, 7430440), (20, 4086742), (22, 3715220), (40, 2043371), (44, 1857610), (55, 1486088), (88, 928805), (110, 743044), (220, 371522), (431, 189640), (440, 185761), (862, 94820), (1724, 47410), (2155, 37928), (3448, 23705), (4310, 18964), (4741, 17240), (8620, 9482)]