18919145

素因数分解:

$5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:150

約数の個数: 48

約数和(自身を含む): 28366848

約数和(自身を除く): 9447703

約数列:

[1, 5, 7, 31, 35, 47, 49, 53, 155, 217, 235, 245, 265, 329, 371, 1085, 1457, 1519, 1643, 1645, 1855, 2303, 2491, 2597, 7285, 7595, 8215, 10199, 11501, 11515, 12455, 12985, 17437, 50995, 57505, 71393, 77221, 80507, 87185, 122059, 356965, 386105, 402535, 540547, 610295, 2702735, 3783829, 18919145]

約数ペア:

[(1, 18919145), (5, 3783829), (7, 2702735), (31, 610295), (35, 540547), (47, 402535), (49, 386105), (53, 356965), (155, 122059), (217, 87185), (235, 80507), (245, 77221), (265, 71393), (329, 57505), (371, 50995), (1085, 17437), (1457, 12985), (1519, 12455), (1643, 11515), (1645, 11501), (1855, 10199), (2303, 8215), (2491, 7595), (2597, 7285)]