21067515

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{1423}}^1$

素因数の和:1488

約数の個数: 48

約数和(自身を含む): 42651648

約数和(自身を除く): 21584133

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 47, 63, 105, 141, 235, 315, 329, 423, 705, 987, 1423, 1645, 2115, 2961, 4269, 4935, 7115, 9961, 12807, 14805, 21345, 29883, 49805, 64035, 66881, 89649, 149415, 200643, 334405, 448245, 468167, 601929, 1003215, 1404501, 2340835, 3009645, 4213503, 7022505, 21067515]

約数ペア:

[(1, 21067515), (3, 7022505), (5, 4213503), (7, 3009645), (9, 2340835), (15, 1404501), (21, 1003215), (35, 601929), (45, 468167), (47, 448245), (63, 334405), (105, 200643), (141, 149415), (235, 89649), (315, 66881), (329, 64035), (423, 49805), (705, 29883), (987, 21345), (1423, 14805), (1645, 12807), (2115, 9961), (2961, 7115), (4269, 4935)]