21431912

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{971}}^1$

素因数の和:1097

約数の個数: 32

約数和(自身を含む): 41990400

約数和(自身を除く): 20558488

約数列:

[1, 2, 4, 8, 31, 62, 89, 124, 178, 248, 356, 712, 971, 1942, 2759, 3884, 5518, 7768, 11036, 22072, 30101, 60202, 86419, 120404, 172838, 240808, 345676, 691352, 2678989, 5357978, 10715956, 21431912]

約数ペア:

[(1, 21431912), (2, 10715956), (4, 5357978), (8, 2678989), (31, 691352), (62, 345676), (89, 240808), (124, 172838), (178, 120404), (248, 86419), (356, 60202), (712, 30101), (971, 22072), (1942, 11036), (2759, 7768), (3884, 5518)]