20690820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1619}}^1$

素因数の和:1705

約数の個数: 72

約数和(自身を含む): 63685440

約数和(自身を除く): 42994620

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 71, 90, 142, 180, 213, 284, 355, 426, 639, 710, 852, 1065, 1278, 1420, 1619, 2130, 2556, 3195, 3238, 4260, 4857, 6390, 6476, 8095, 9714, 12780, 14571, 16190, 19428, 24285, 29142, 32380, 48570, 58284, 72855, 97140, 114949, 145710, 229898, 291420, 344847, 459796, 574745, 689694, 1034541, 1149490, 1379388, 1724235, 2069082, 2298980, 3448470, 4138164, 5172705, 6896940, 10345410, 20690820]

約数ペア:

[(1, 20690820), (2, 10345410), (3, 6896940), (4, 5172705), (5, 4138164), (6, 3448470), (9, 2298980), (10, 2069082), (12, 1724235), (15, 1379388), (18, 1149490), (20, 1034541), (30, 689694), (36, 574745), (45, 459796), (60, 344847), (71, 291420), (90, 229898), (142, 145710), (180, 114949), (213, 97140), (284, 72855), (355, 58284), (426, 48570), (639, 32380), (710, 29142), (852, 24285), (1065, 19428), (1278, 16190), (1420, 14571), (1619, 12780), (2130, 9714), (2556, 8095), (3195, 6476), (3238, 6390), (4260, 4857)]