About the Number

21251320

21251319 ← → 21251321

2進数表記:1010001000100010011111000

漢数字表記:二千百二十五万千三百二十

素因数分解:

2 3 × 5 1 × 37 1 × 83 1 × 173 1

素因数の和:304
約数の個数: 64
約数和(自身を含む): 49986720
約数和(自身を除く): 28735400

約数列:
[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 83, 148, 166, 173, 185, 296, 332, 346, 370, 415, 664, 692, 740, 830, 865, 1384, 1480, 1660, 1730, 3071, 3320, 3460, 6142, 6401, 6920, 12284, 12802, 14359, 15355, 24568, 25604, 28718, 30710, 32005, 51208, 57436, 61420, 64010, 71795, 114872, 122840, 128020, 143590, 256040, 287180, 531283, 574360, 1062566, 2125132, 2656415, 4250264, 5312830, 10625660, 21251320]

約数ペア:
[(1, 21251320), (2, 10625660), (4, 5312830), (5, 4250264), (8, 2656415), (10, 2125132), (20, 1062566), (37, 574360), (40, 531283), (74, 287180), (83, 256040), (148, 143590), (166, 128020), (173, 122840), (185, 114872), (296, 71795), (332, 64010), (346, 61420), (370, 57436), (415, 51208), (664, 32005), (692, 30710), (740, 28718), (830, 25604), (865, 24568), (1384, 15355), (1480, 14359), (1660, 12802), (1730, 12284), (3071, 6920), (3320, 6401), (3460, 6142)]

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