20768440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{613}}^1$

素因数の和:653

約数の個数: 96

約数和(自身を含む): 58796640

約数和(自身を除く): 38028200

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 88, 110, 121, 140, 154, 220, 242, 280, 308, 385, 440, 484, 605, 613, 616, 770, 847, 968, 1210, 1226, 1540, 1694, 2420, 2452, 3065, 3080, 3388, 4235, 4291, 4840, 4904, 6130, 6743, 6776, 8470, 8582, 12260, 13486, 16940, 17164, 21455, 24520, 26972, 33715, 33880, 34328, 42910, 47201, 53944, 67430, 74173, 85820, 94402, 134860, 148346, 171640, 188804, 236005, 269720, 296692, 370865, 377608, 472010, 519211, 593384, 741730, 944020, 1038422, 1483460, 1888040, 2076844, 2596055, 2966920, 4153688, 5192110, 10384220, 20768440]

約数ペア:

[(1, 20768440), (2, 10384220), (4, 5192110), (5, 4153688), (7, 2966920), (8, 2596055), (10, 2076844), (11, 1888040), (14, 1483460), (20, 1038422), (22, 944020), (28, 741730), (35, 593384), (40, 519211), (44, 472010), (55, 377608), (56, 370865), (70, 296692), (77, 269720), (88, 236005), (110, 188804), (121, 171640), (140, 148346), (154, 134860), (220, 94402), (242, 85820), (280, 74173), (308, 67430), (385, 53944), (440, 47201), (484, 42910), (605, 34328), (613, 33880), (616, 33715), (770, 26972), (847, 24520), (968, 21455), (1210, 17164), (1226, 16940), (1540, 13486), (1694, 12260), (2420, 8582), (2452, 8470), (3065, 6776), (3080, 6743), (3388, 6130), (4235, 4904), (4291, 4840)]