20788090

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:187

約数の個数: 64

約数和(自身を含む): 42301440

約数和(自身を除く): 21513350

約数列:

[1, 2, 5, 10, 19, 23, 38, 46, 67, 71, 95, 115, 134, 142, 190, 230, 335, 355, 437, 670, 710, 874, 1273, 1349, 1541, 1633, 2185, 2546, 2698, 3082, 3266, 4370, 4757, 6365, 6745, 7705, 8165, 9514, 12730, 13490, 15410, 16330, 23785, 29279, 31027, 47570, 58558, 62054, 90383, 109411, 146395, 155135, 180766, 218822, 292790, 310270, 451915, 547055, 903830, 1094110, 2078809, 4157618, 10394045, 20788090]

約数ペア:

[(1, 20788090), (2, 10394045), (5, 4157618), (10, 2078809), (19, 1094110), (23, 903830), (38, 547055), (46, 451915), (67, 310270), (71, 292790), (95, 218822), (115, 180766), (134, 155135), (142, 146395), (190, 109411), (230, 90383), (335, 62054), (355, 58558), (437, 47570), (670, 31027), (710, 29279), (874, 23785), (1273, 16330), (1349, 15410), (1541, 13490), (1633, 12730), (2185, 9514), (2546, 8165), (2698, 7705), (3082, 6745), (3266, 6365), (4370, 4757)]