19890560

素因数分解:

$2^7\times 5^1\times {\mathrm{31079}}^1$

素因数の和:31098

約数の個数: 32

約数和(自身を含む): 47552400

約数和(自身を除く): 27661840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 31079, 62158, 124316, 155395, 248632, 310790, 497264, 621580, 994528, 1243160, 1989056, 2486320, 3978112, 4972640, 9945280, 19890560]

約数ペア:

[(1, 19890560), (2, 9945280), (4, 4972640), (5, 3978112), (8, 2486320), (10, 1989056), (16, 1243160), (20, 994528), (32, 621580), (40, 497264), (64, 310790), (80, 248632), (128, 155395), (160, 124316), (320, 62158), (640, 31079)]