About the Number

21300020

21300019 ← → 21300021

2進数表記:1010001010000001100110100

漢数字表記:二千百三十万二十

素因数分解:

2 2 × 5 1 × 7 1 × 353 1 × 431 1

素因数の和:800
約数の個数: 48
約数和(自身を含む): 51383808
約数和(自身を除く): 30083788

約数列:
[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 353, 431, 706, 862, 1412, 1724, 1765, 2155, 2471, 3017, 3530, 4310, 4942, 6034, 7060, 8620, 9884, 12068, 12355, 15085, 24710, 30170, 49420, 60340, 152143, 304286, 608572, 760715, 1065001, 1521430, 2130002, 3042860, 4260004, 5325005, 10650010, 21300020]

約数ペア:
[(1, 21300020), (2, 10650010), (4, 5325005), (5, 4260004), (7, 3042860), (10, 2130002), (14, 1521430), (20, 1065001), (28, 760715), (35, 608572), (70, 304286), (140, 152143), (353, 60340), (431, 49420), (706, 30170), (862, 24710), (1412, 15085), (1724, 12355), (1765, 12068), (2155, 9884), (2471, 8620), (3017, 7060), (3530, 6034), (4310, 4942)]

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