21858400

素因数分解:

$2^5\times 5^2\times {\mathrm{89}}^1\times {\mathrm{307}}^1$

素因数の和:416

約数の個数: 72

約数和(自身を含む): 54137160

約数和(自身を除く): 32278760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 89, 100, 160, 178, 200, 307, 356, 400, 445, 614, 712, 800, 890, 1228, 1424, 1535, 1780, 2225, 2456, 2848, 3070, 3560, 4450, 4912, 6140, 7120, 7675, 8900, 9824, 12280, 14240, 15350, 17800, 24560, 27323, 30700, 35600, 49120, 54646, 61400, 71200, 109292, 122800, 136615, 218584, 245600, 273230, 437168, 546460, 683075, 874336, 1092920, 1366150, 2185840, 2732300, 4371680, 5464600, 10929200, 21858400]

約数ペア:

[(1, 21858400), (2, 10929200), (4, 5464600), (5, 4371680), (8, 2732300), (10, 2185840), (16, 1366150), (20, 1092920), (25, 874336), (32, 683075), (40, 546460), (50, 437168), (80, 273230), (89, 245600), (100, 218584), (160, 136615), (178, 122800), (200, 109292), (307, 71200), (356, 61400), (400, 54646), (445, 49120), (614, 35600), (712, 30700), (800, 27323), (890, 24560), (1228, 17800), (1424, 15350), (1535, 14240), (1780, 12280), (2225, 9824), (2456, 8900), (2848, 7675), (3070, 7120), (3560, 6140), (4450, 4912)]