21232980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{179}}^1\times {\mathrm{659}}^1$

素因数の和:853

約数の個数: 72

約数和(自身を含む): 64864800

約数和(自身を除く): 43631820

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 179, 180, 358, 537, 659, 716, 895, 1074, 1318, 1611, 1790, 1977, 2148, 2636, 2685, 3222, 3295, 3580, 3954, 5370, 5931, 6444, 6590, 7908, 8055, 9885, 10740, 11862, 13180, 16110, 19770, 23724, 29655, 32220, 39540, 59310, 117961, 118620, 235922, 353883, 471844, 589805, 707766, 1061649, 1179610, 1415532, 1769415, 2123298, 2359220, 3538830, 4246596, 5308245, 7077660, 10616490, 21232980]

約数ペア:

[(1, 21232980), (2, 10616490), (3, 7077660), (4, 5308245), (5, 4246596), (6, 3538830), (9, 2359220), (10, 2123298), (12, 1769415), (15, 1415532), (18, 1179610), (20, 1061649), (30, 707766), (36, 589805), (45, 471844), (60, 353883), (90, 235922), (179, 118620), (180, 117961), (358, 59310), (537, 39540), (659, 32220), (716, 29655), (895, 23724), (1074, 19770), (1318, 16110), (1611, 13180), (1790, 11862), (1977, 10740), (2148, 9885), (2636, 8055), (2685, 7908), (3222, 6590), (3295, 6444), (3580, 5931), (3954, 5370)]