18810855

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{449}}^1$

素因数の和:493

約数の個数: 72

約数和(自身を含む): 40014000

約数和(自身を除く): 21203145

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 35, 45, 49, 57, 63, 95, 105, 133, 147, 171, 245, 285, 315, 399, 441, 449, 665, 735, 855, 931, 1197, 1347, 1995, 2205, 2245, 2793, 3143, 4041, 4655, 5985, 6735, 8379, 8531, 9429, 13965, 15715, 20205, 22001, 25593, 28287, 41895, 42655, 47145, 59717, 66003, 76779, 110005, 127965, 141435, 179151, 198009, 298585, 330015, 383895, 418019, 537453, 895755, 990045, 1254057, 2090095, 2687265, 3762171, 6270285, 18810855]

約数ペア:

[(1, 18810855), (3, 6270285), (5, 3762171), (7, 2687265), (9, 2090095), (15, 1254057), (19, 990045), (21, 895755), (35, 537453), (45, 418019), (49, 383895), (57, 330015), (63, 298585), (95, 198009), (105, 179151), (133, 141435), (147, 127965), (171, 110005), (245, 76779), (285, 66003), (315, 59717), (399, 47145), (441, 42655), (449, 41895), (665, 28287), (735, 25593), (855, 22001), (931, 20205), (1197, 15715), (1347, 13965), (1995, 9429), (2205, 8531), (2245, 8379), (2793, 6735), (3143, 5985), (4041, 4655)]