20897720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{887}}^1$

素因数の和:948

約数の個数: 64

約数和(自身を含む): 51148800

約数和(自身を除く): 30251080

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 31, 38, 40, 62, 76, 95, 124, 152, 155, 190, 248, 310, 380, 589, 620, 760, 887, 1178, 1240, 1774, 2356, 2945, 3548, 4435, 4712, 5890, 7096, 8870, 11780, 16853, 17740, 23560, 27497, 33706, 35480, 54994, 67412, 84265, 109988, 134824, 137485, 168530, 219976, 274970, 337060, 522443, 549940, 674120, 1044886, 1099880, 2089772, 2612215, 4179544, 5224430, 10448860, 20897720]

約数ペア:

[(1, 20897720), (2, 10448860), (4, 5224430), (5, 4179544), (8, 2612215), (10, 2089772), (19, 1099880), (20, 1044886), (31, 674120), (38, 549940), (40, 522443), (62, 337060), (76, 274970), (95, 219976), (124, 168530), (152, 137485), (155, 134824), (190, 109988), (248, 84265), (310, 67412), (380, 54994), (589, 35480), (620, 33706), (760, 27497), (887, 23560), (1178, 17740), (1240, 16853), (1774, 11780), (2356, 8870), (2945, 7096), (3548, 5890), (4435, 4712)]