20743905

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{13}}^2\times {\mathrm{167}}^1$

素因数の和:215

約数の個数: 72

約数和(自身を含む): 42057792

約数和(自身を除く): 21313887

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 49, 65, 91, 105, 147, 167, 169, 195, 245, 273, 455, 501, 507, 637, 735, 835, 845, 1169, 1183, 1365, 1911, 2171, 2505, 2535, 3185, 3507, 3549, 5845, 5915, 6513, 8183, 8281, 9555, 10855, 15197, 17535, 17745, 24549, 24843, 28223, 32565, 40915, 41405, 45591, 75985, 84669, 106379, 122745, 124215, 141115, 197561, 227955, 319137, 423345, 531895, 592683, 987805, 1382927, 1595685, 2963415, 4148781, 6914635, 20743905]

約数ペア:

[(1, 20743905), (3, 6914635), (5, 4148781), (7, 2963415), (13, 1595685), (15, 1382927), (21, 987805), (35, 592683), (39, 531895), (49, 423345), (65, 319137), (91, 227955), (105, 197561), (147, 141115), (167, 124215), (169, 122745), (195, 106379), (245, 84669), (273, 75985), (455, 45591), (501, 41405), (507, 40915), (637, 32565), (735, 28223), (835, 24843), (845, 24549), (1169, 17745), (1183, 17535), (1365, 15197), (1911, 10855), (2171, 9555), (2505, 8281), (2535, 8183), (3185, 6513), (3507, 5915), (3549, 5845)]