18891880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{619}}^1$

素因数の和:746

約数の個数: 64

約数和(自身を含む): 49104000

約数和(自身を除く): 30212120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 109, 140, 218, 280, 436, 545, 619, 763, 872, 1090, 1238, 1526, 2180, 2476, 3052, 3095, 3815, 4333, 4360, 4952, 6104, 6190, 7630, 8666, 12380, 15260, 17332, 21665, 24760, 30520, 34664, 43330, 67471, 86660, 134942, 173320, 269884, 337355, 472297, 539768, 674710, 944594, 1349420, 1889188, 2361485, 2698840, 3778376, 4722970, 9445940, 18891880]

約数ペア:

[(1, 18891880), (2, 9445940), (4, 4722970), (5, 3778376), (7, 2698840), (8, 2361485), (10, 1889188), (14, 1349420), (20, 944594), (28, 674710), (35, 539768), (40, 472297), (56, 337355), (70, 269884), (109, 173320), (140, 134942), (218, 86660), (280, 67471), (436, 43330), (545, 34664), (619, 30520), (763, 24760), (872, 21665), (1090, 17332), (1238, 15260), (1526, 12380), (2180, 8666), (2476, 7630), (3052, 6190), (3095, 6104), (3815, 4952), (4333, 4360)]