20906775

素因数分解:

$3^3\times 5^2\times {\mathrm{47}}^1\times {\mathrm{659}}^1$

素因数の和:725

約数の個数: 48

約数和(自身を含む): 39283200

約数和(自身を除く): 18376425

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 47, 75, 135, 141, 225, 235, 423, 659, 675, 705, 1175, 1269, 1977, 2115, 3295, 3525, 5931, 6345, 9885, 10575, 16475, 17793, 29655, 30973, 31725, 49425, 88965, 92919, 148275, 154865, 278757, 444825, 464595, 774325, 836271, 1393785, 2322975, 4181355, 6968925, 20906775]

約数ペア:

[(1, 20906775), (3, 6968925), (5, 4181355), (9, 2322975), (15, 1393785), (25, 836271), (27, 774325), (45, 464595), (47, 444825), (75, 278757), (135, 154865), (141, 148275), (225, 92919), (235, 88965), (423, 49425), (659, 31725), (675, 30973), (705, 29655), (1175, 17793), (1269, 16475), (1977, 10575), (2115, 9885), (3295, 6345), (3525, 5931)]