20890240

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{4663}}^1$

素因数の和:4689

約数の個数: 64

約数和(自身を含む): 57087360

約数和(自身を除く): 36197120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 140, 160, 224, 280, 320, 448, 560, 640, 896, 1120, 2240, 4480, 4663, 9326, 18652, 23315, 32641, 37304, 46630, 65282, 74608, 93260, 130564, 149216, 163205, 186520, 261128, 298432, 326410, 373040, 522256, 596864, 652820, 746080, 1044512, 1305640, 1492160, 2089024, 2611280, 2984320, 4178048, 5222560, 10445120, 20890240]

約数ペア:

[(1, 20890240), (2, 10445120), (4, 5222560), (5, 4178048), (7, 2984320), (8, 2611280), (10, 2089024), (14, 1492160), (16, 1305640), (20, 1044512), (28, 746080), (32, 652820), (35, 596864), (40, 522256), (56, 373040), (64, 326410), (70, 298432), (80, 261128), (112, 186520), (128, 163205), (140, 149216), (160, 130564), (224, 93260), (280, 74608), (320, 65282), (448, 46630), (560, 37304), (640, 32641), (896, 23315), (1120, 18652), (2240, 9326), (4480, 4663)]