81464900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{2389}}^1$

素因数の和:2445

約数の個数: 72

約数和(自身を含む): 199153920

約数和(自身を除く): 117689020

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 31, 44, 50, 55, 62, 100, 110, 124, 155, 220, 275, 310, 341, 550, 620, 682, 775, 1100, 1364, 1550, 1705, 2389, 3100, 3410, 4778, 6820, 8525, 9556, 11945, 17050, 23890, 26279, 34100, 47780, 52558, 59725, 74059, 105116, 119450, 131395, 148118, 238900, 262790, 296236, 370295, 525580, 656975, 740590, 814649, 1313950, 1481180, 1629298, 1851475, 2627900, 3258596, 3702950, 4073245, 7405900, 8146490, 16292980, 20366225, 40732450, 81464900]

約数ペア:

[(1, 81464900), (2, 40732450), (4, 20366225), (5, 16292980), (10, 8146490), (11, 7405900), (20, 4073245), (22, 3702950), (25, 3258596), (31, 2627900), (44, 1851475), (50, 1629298), (55, 1481180), (62, 1313950), (100, 814649), (110, 740590), (124, 656975), (155, 525580), (220, 370295), (275, 296236), (310, 262790), (341, 238900), (550, 148118), (620, 131395), (682, 119450), (775, 105116), (1100, 74059), (1364, 59725), (1550, 52558), (1705, 47780), (2389, 34100), (3100, 26279), (3410, 23890), (4778, 17050), (6820, 11945), (8525, 9556)]