21270880

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{6997}}^1$

素因数の和:7031

約数の個数: 48

約数和(自身を含む): 52904880

約数和(自身を除く): 31634000

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 1520, 3040, 6997, 13994, 27988, 34985, 55976, 69970, 111952, 132943, 139940, 223904, 265886, 279880, 531772, 559760, 664715, 1063544, 1119520, 1329430, 2127088, 2658860, 4254176, 5317720, 10635440, 21270880]

約数ペア:

[(1, 21270880), (2, 10635440), (4, 5317720), (5, 4254176), (8, 2658860), (10, 2127088), (16, 1329430), (19, 1119520), (20, 1063544), (32, 664715), (38, 559760), (40, 531772), (76, 279880), (80, 265886), (95, 223904), (152, 139940), (160, 132943), (190, 111952), (304, 69970), (380, 55976), (608, 34985), (760, 27988), (1520, 13994), (3040, 6997)]