21494780

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{937}}^1$

素因数の和:1014

約数の個数: 48

約数和(自身を含む): 47905536

約数和(自身を除く): 26410756

約数列:

[1, 2, 4, 5, 10, 20, 31, 37, 62, 74, 124, 148, 155, 185, 310, 370, 620, 740, 937, 1147, 1874, 2294, 3748, 4588, 4685, 5735, 9370, 11470, 18740, 22940, 29047, 34669, 58094, 69338, 116188, 138676, 145235, 173345, 290470, 346690, 580940, 693380, 1074739, 2149478, 4298956, 5373695, 10747390, 21494780]

約数ペア:

[(1, 21494780), (2, 10747390), (4, 5373695), (5, 4298956), (10, 2149478), (20, 1074739), (31, 693380), (37, 580940), (62, 346690), (74, 290470), (124, 173345), (148, 145235), (155, 138676), (185, 116188), (310, 69338), (370, 58094), (620, 34669), (740, 29047), (937, 22940), (1147, 18740), (1874, 11470), (2294, 9370), (3748, 5735), (4588, 4685)]