21380080

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{233}}^1$

素因数の和:314

約数の個数: 80

約数和(自身を含む): 52925184

約数和(自身を除く): 31545104

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 37, 40, 62, 74, 80, 124, 148, 155, 185, 233, 248, 296, 310, 370, 466, 496, 592, 620, 740, 932, 1147, 1165, 1240, 1480, 1864, 2294, 2330, 2480, 2960, 3728, 4588, 4660, 5735, 7223, 8621, 9176, 9320, 11470, 14446, 17242, 18352, 18640, 22940, 28892, 34484, 36115, 43105, 45880, 57784, 68968, 72230, 86210, 91760, 115568, 137936, 144460, 172420, 267251, 288920, 344840, 534502, 577840, 689680, 1069004, 1336255, 2138008, 2672510, 4276016, 5345020, 10690040, 21380080]

約数ペア:

[(1, 21380080), (2, 10690040), (4, 5345020), (5, 4276016), (8, 2672510), (10, 2138008), (16, 1336255), (20, 1069004), (31, 689680), (37, 577840), (40, 534502), (62, 344840), (74, 288920), (80, 267251), (124, 172420), (148, 144460), (155, 137936), (185, 115568), (233, 91760), (248, 86210), (296, 72230), (310, 68968), (370, 57784), (466, 45880), (496, 43105), (592, 36115), (620, 34484), (740, 28892), (932, 22940), (1147, 18640), (1165, 18352), (1240, 17242), (1480, 14446), (1864, 11470), (2294, 9320), (2330, 9176), (2480, 8621), (2960, 7223), (3728, 5735), (4588, 4660)]