2145220

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{199}}^1$

素因数の和:233

約数の個数: 72

約数和(自身を含む): 5745600

約数和(自身を除く): 3600380

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 49, 55, 70, 77, 98, 110, 140, 154, 196, 199, 220, 245, 308, 385, 398, 490, 539, 770, 796, 980, 995, 1078, 1393, 1540, 1990, 2156, 2189, 2695, 2786, 3980, 4378, 5390, 5572, 6965, 8756, 9751, 10780, 10945, 13930, 15323, 19502, 21890, 27860, 30646, 39004, 43780, 48755, 61292, 76615, 97510, 107261, 153230, 195020, 214522, 306460, 429044, 536305, 1072610, 2145220]

約数ペア:

[(1, 2145220), (2, 1072610), (4, 536305), (5, 429044), (7, 306460), (10, 214522), (11, 195020), (14, 153230), (20, 107261), (22, 97510), (28, 76615), (35, 61292), (44, 48755), (49, 43780), (55, 39004), (70, 30646), (77, 27860), (98, 21890), (110, 19502), (140, 15323), (154, 13930), (196, 10945), (199, 10780), (220, 9751), (245, 8756), (308, 6965), (385, 5572), (398, 5390), (490, 4378), (539, 3980), (770, 2786), (796, 2695), (980, 2189), (995, 2156), (1078, 1990), (1393, 1540)]