81181375

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{151}}^1$

素因数の和:217

約数の個数: 64

約数和(自身を含む): 122923008

約数和(自身を除く): 41741633

約数列:

[1, 5, 11, 17, 23, 25, 55, 85, 115, 125, 151, 187, 253, 275, 391, 425, 575, 755, 935, 1265, 1375, 1661, 1955, 2125, 2567, 2875, 3473, 3775, 4301, 4675, 6325, 8305, 9775, 12835, 17365, 18875, 21505, 23375, 28237, 31625, 38203, 41525, 48875, 59041, 64175, 86825, 107525, 141185, 191015, 207625, 295205, 320875, 434125, 537625, 649451, 705925, 955075, 1476025, 3247255, 3529625, 4775375, 7380125, 16236275, 81181375]

約数ペア:

[(1, 81181375), (5, 16236275), (11, 7380125), (17, 4775375), (23, 3529625), (25, 3247255), (55, 1476025), (85, 955075), (115, 705925), (125, 649451), (151, 537625), (187, 434125), (253, 320875), (275, 295205), (391, 207625), (425, 191015), (575, 141185), (755, 107525), (935, 86825), (1265, 64175), (1375, 59041), (1661, 48875), (1955, 41525), (2125, 38203), (2567, 31625), (2875, 28237), (3473, 23375), (3775, 21505), (4301, 18875), (4675, 17365), (6325, 12835), (8305, 9775)]