21396180

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27431}}^1$

素因数の和:27456

約数の個数: 48

約数和(自身を含む): 64520064

約数和(自身を除く): 43123884

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27431, 54862, 82293, 109724, 137155, 164586, 274310, 329172, 356603, 411465, 548620, 713206, 822930, 1069809, 1426412, 1645860, 1783015, 2139618, 3566030, 4279236, 5349045, 7132060, 10698090, 21396180]

約数ペア:

[(1, 21396180), (2, 10698090), (3, 7132060), (4, 5349045), (5, 4279236), (6, 3566030), (10, 2139618), (12, 1783015), (13, 1645860), (15, 1426412), (20, 1069809), (26, 822930), (30, 713206), (39, 548620), (52, 411465), (60, 356603), (65, 329172), (78, 274310), (130, 164586), (156, 137155), (195, 109724), (260, 82293), (390, 54862), (780, 27431)]