About the Number

21131490

21131489 ← → 21131491

2進数表記:1010000100111000011100010

漢数字表記:二千百十三万千四百九十

素因数分解:

2 1 × 3 1 × 5 1 × 43 1 × 16381 1

素因数の和:16434
約数の個数: 32
約数和(自身を含む): 51898176
約数和(自身を除く): 30766686

約数列:
[1, 2, 3, 5, 6, 10, 15, 30, 43, 86, 129, 215, 258, 430, 645, 1290, 16381, 32762, 49143, 81905, 98286, 163810, 245715, 491430, 704383, 1408766, 2113149, 3521915, 4226298, 7043830, 10565745, 21131490]

約数ペア:
[(1, 21131490), (2, 10565745), (3, 7043830), (5, 4226298), (6, 3521915), (10, 2113149), (15, 1408766), (30, 704383), (43, 491430), (86, 245715), (129, 163810), (215, 98286), (258, 81905), (430, 49143), (645, 32762), (1290, 16381)]

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