16819220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{859}}^1$

素因数の和:968

約数の個数: 48

約数和(自身を含む): 39009600

約数和(自身を除く): 22190380

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 178, 220, 356, 445, 859, 890, 979, 1718, 1780, 1958, 3436, 3916, 4295, 4895, 8590, 9449, 9790, 17180, 18898, 19580, 37796, 47245, 76451, 94490, 152902, 188980, 305804, 382255, 764510, 840961, 1529020, 1681922, 3363844, 4204805, 8409610, 16819220]

約数ペア:

[(1, 16819220), (2, 8409610), (4, 4204805), (5, 3363844), (10, 1681922), (11, 1529020), (20, 840961), (22, 764510), (44, 382255), (55, 305804), (89, 188980), (110, 152902), (178, 94490), (220, 76451), (356, 47245), (445, 37796), (859, 19580), (890, 18898), (979, 17180), (1718, 9790), (1780, 9449), (1958, 8590), (3436, 4895), (3916, 4295)]