20447216

素因数分解:

$2^4\times {\mathrm{83}}^1\times {\mathrm{89}}^1\times {\mathrm{173}}^1$

素因数の和:353

約数の個数: 40

約数和(自身を含む): 40778640

約数和(自身を除く): 20331424

約数列:

[1, 2, 4, 8, 16, 83, 89, 166, 173, 178, 332, 346, 356, 664, 692, 712, 1328, 1384, 1424, 2768, 7387, 14359, 14774, 15397, 28718, 29548, 30794, 57436, 59096, 61588, 114872, 118192, 123176, 229744, 246352, 1277951, 2555902, 5111804, 10223608, 20447216]

約数ペア:

[(1, 20447216), (2, 10223608), (4, 5111804), (8, 2555902), (16, 1277951), (83, 246352), (89, 229744), (166, 123176), (173, 118192), (178, 114872), (332, 61588), (346, 59096), (356, 57436), (664, 30794), (692, 29548), (712, 28718), (1328, 15397), (1384, 14774), (1424, 14359), (2768, 7387)]