21678410

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{1619}}^1$

素因数の和:1742

約数の個数: 32

約数和(自身を含む): 42456960

約数和(自身を除く): 20778550

約数列:

[1, 2, 5, 10, 13, 26, 65, 103, 130, 206, 515, 1030, 1339, 1619, 2678, 3238, 6695, 8095, 13390, 16190, 21047, 42094, 105235, 166757, 210470, 333514, 833785, 1667570, 2167841, 4335682, 10839205, 21678410]

約数ペア:

[(1, 21678410), (2, 10839205), (5, 4335682), (10, 2167841), (13, 1667570), (26, 833785), (65, 333514), (103, 210470), (130, 166757), (206, 105235), (515, 42094), (1030, 21047), (1339, 16190), (1619, 13390), (2678, 8095), (3238, 6695)]