81431900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{409}}^1$

素因数の和:615

約数の個数: 72

約数和(自身を含む): 194310480

約数和(自身を除く): 112878580

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 181, 220, 275, 362, 409, 550, 724, 818, 905, 1100, 1636, 1810, 1991, 2045, 3620, 3982, 4090, 4499, 4525, 7964, 8180, 8998, 9050, 9955, 10225, 17996, 18100, 19910, 20450, 22495, 39820, 40900, 44990, 49775, 74029, 89980, 99550, 112475, 148058, 199100, 224950, 296116, 370145, 449900, 740290, 814319, 1480580, 1628638, 1850725, 3257276, 3701450, 4071595, 7402900, 8143190, 16286380, 20357975, 40715950, 81431900]

約数ペア:

[(1, 81431900), (2, 40715950), (4, 20357975), (5, 16286380), (10, 8143190), (11, 7402900), (20, 4071595), (22, 3701450), (25, 3257276), (44, 1850725), (50, 1628638), (55, 1480580), (100, 814319), (110, 740290), (181, 449900), (220, 370145), (275, 296116), (362, 224950), (409, 199100), (550, 148058), (724, 112475), (818, 99550), (905, 89980), (1100, 74029), (1636, 49775), (1810, 44990), (1991, 40900), (2045, 39820), (3620, 22495), (3982, 20450), (4090, 19910), (4499, 18100), (4525, 17996), (7964, 10225), (8180, 9955), (8998, 9050)]