20764055

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1$

素因数の和:120

約数の個数: 64

約数和(自身を含む): 31933440

約数和(自身を除く): 11169385

約数列:

[1, 5, 13, 17, 19, 23, 43, 65, 85, 95, 115, 215, 221, 247, 299, 323, 391, 437, 559, 731, 817, 989, 1105, 1235, 1495, 1615, 1955, 2185, 2795, 3655, 4085, 4199, 4945, 5083, 5681, 7429, 9503, 10621, 12857, 13889, 16813, 18791, 20995, 25415, 28405, 37145, 47515, 53105, 64285, 69445, 84065, 93955, 96577, 180557, 218569, 244283, 319447, 482885, 902785, 1092845, 1221415, 1597235, 4152811, 20764055]

約数ペア:

[(1, 20764055), (5, 4152811), (13, 1597235), (17, 1221415), (19, 1092845), (23, 902785), (43, 482885), (65, 319447), (85, 244283), (95, 218569), (115, 180557), (215, 96577), (221, 93955), (247, 84065), (299, 69445), (323, 64285), (391, 53105), (437, 47515), (559, 37145), (731, 28405), (817, 25415), (989, 20995), (1105, 18791), (1235, 16813), (1495, 13889), (1615, 12857), (1955, 10621), (2185, 9503), (2795, 7429), (3655, 5681), (4085, 5083), (4199, 4945)]