20521260

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{173}}^1\times {\mathrm{659}}^1$

素因数の和:847

約数の個数: 72

約数和(自身を含む): 62702640

約数和(自身を除く): 42181380

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 173, 180, 346, 519, 659, 692, 865, 1038, 1318, 1557, 1730, 1977, 2076, 2595, 2636, 3114, 3295, 3460, 3954, 5190, 5931, 6228, 6590, 7785, 7908, 9885, 10380, 11862, 13180, 15570, 19770, 23724, 29655, 31140, 39540, 59310, 114007, 118620, 228014, 342021, 456028, 570035, 684042, 1026063, 1140070, 1368084, 1710105, 2052126, 2280140, 3420210, 4104252, 5130315, 6840420, 10260630, 20521260]

約数ペア:

[(1, 20521260), (2, 10260630), (3, 6840420), (4, 5130315), (5, 4104252), (6, 3420210), (9, 2280140), (10, 2052126), (12, 1710105), (15, 1368084), (18, 1140070), (20, 1026063), (30, 684042), (36, 570035), (45, 456028), (60, 342021), (90, 228014), (173, 118620), (180, 114007), (346, 59310), (519, 39540), (659, 31140), (692, 29655), (865, 23724), (1038, 19770), (1318, 15570), (1557, 13180), (1730, 11862), (1977, 10380), (2076, 9885), (2595, 7908), (2636, 7785), (3114, 6590), (3295, 6228), (3460, 5931), (3954, 5190)]