81449980

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{317}}^1\times {\mathrm{443}}^1$

素因数の和:798

約数の個数: 48

約数和(自身を含む): 177901920

約数和(自身を除く): 96451940

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 317, 443, 580, 634, 886, 1268, 1585, 1772, 2215, 3170, 4430, 6340, 8860, 9193, 12847, 18386, 25694, 36772, 45965, 51388, 64235, 91930, 128470, 140431, 183860, 256940, 280862, 561724, 702155, 1404310, 2808620, 4072499, 8144998, 16289996, 20362495, 40724990, 81449980]

約数ペア:

[(1, 81449980), (2, 40724990), (4, 20362495), (5, 16289996), (10, 8144998), (20, 4072499), (29, 2808620), (58, 1404310), (116, 702155), (145, 561724), (290, 280862), (317, 256940), (443, 183860), (580, 140431), (634, 128470), (886, 91930), (1268, 64235), (1585, 51388), (1772, 45965), (2215, 36772), (3170, 25694), (4430, 18386), (6340, 12847), (8860, 9193)]