28457720

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{107}}^1\times {\mathrm{109}}^1$

素因数の和:288

約数の個数: 64

約数和(自身を含む): 66290400

約数和(自身を除く): 37832680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 107, 109, 122, 214, 218, 244, 305, 428, 436, 488, 535, 545, 610, 856, 872, 1070, 1090, 1220, 2140, 2180, 2440, 4280, 4360, 6527, 6649, 11663, 13054, 13298, 23326, 26108, 26596, 32635, 33245, 46652, 52216, 53192, 58315, 65270, 66490, 93304, 116630, 130540, 132980, 233260, 261080, 265960, 466520, 711443, 1422886, 2845772, 3557215, 5691544, 7114430, 14228860, 28457720]

約数ペア:

[(1, 28457720), (2, 14228860), (4, 7114430), (5, 5691544), (8, 3557215), (10, 2845772), (20, 1422886), (40, 711443), (61, 466520), (107, 265960), (109, 261080), (122, 233260), (214, 132980), (218, 130540), (244, 116630), (305, 93304), (428, 66490), (436, 65270), (488, 58315), (535, 53192), (545, 52216), (610, 46652), (856, 33245), (872, 32635), (1070, 26596), (1090, 26108), (1220, 23326), (2140, 13298), (2180, 13054), (2440, 11663), (4280, 6649), (4360, 6527)]