81604980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{12253}}^1$

素因数の和:12305

約数の個数: 72

約数和(自身を含む): 254245992

約数和(自身を除く): 172641012

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 37, 45, 60, 74, 90, 111, 148, 180, 185, 222, 333, 370, 444, 555, 666, 740, 1110, 1332, 1665, 2220, 3330, 6660, 12253, 24506, 36759, 49012, 61265, 73518, 110277, 122530, 147036, 183795, 220554, 245060, 367590, 441108, 453361, 551385, 735180, 906722, 1102770, 1360083, 1813444, 2205540, 2266805, 2720166, 4080249, 4533610, 5440332, 6800415, 8160498, 9067220, 13600830, 16320996, 20401245, 27201660, 40802490, 81604980]

約数ペア:

[(1, 81604980), (2, 40802490), (3, 27201660), (4, 20401245), (5, 16320996), (6, 13600830), (9, 9067220), (10, 8160498), (12, 6800415), (15, 5440332), (18, 4533610), (20, 4080249), (30, 2720166), (36, 2266805), (37, 2205540), (45, 1813444), (60, 1360083), (74, 1102770), (90, 906722), (111, 735180), (148, 551385), (180, 453361), (185, 441108), (222, 367590), (333, 245060), (370, 220554), (444, 183795), (555, 147036), (666, 122530), (740, 110277), (1110, 73518), (1332, 61265), (1665, 49012), (2220, 36759), (3330, 24506), (6660, 12253)]