20120516

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{3989}}^1$

素因数の和:4103

約数の個数: 24

約数和(自身を含む): 38319960

約数和(自身を除く): 18199444

約数列:

[1, 2, 4, 13, 26, 52, 97, 194, 388, 1261, 2522, 3989, 5044, 7978, 15956, 51857, 103714, 207428, 386933, 773866, 1547732, 5030129, 10060258, 20120516]

約数ペア:

[(1, 20120516), (2, 10060258), (4, 5030129), (13, 1547732), (26, 773866), (52, 386933), (97, 207428), (194, 103714), (388, 51857), (1261, 15956), (2522, 7978), (3989, 5044)]