21208880

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{313}}^1$

素因数の和:355

約数の個数: 120

約数和(自身を含む): 62141856

約数和(自身を除く): 40932976

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 80, 88, 110, 112, 121, 140, 154, 176, 220, 242, 280, 308, 313, 385, 440, 484, 560, 605, 616, 626, 770, 847, 880, 968, 1210, 1232, 1252, 1540, 1565, 1694, 1936, 2191, 2420, 2504, 3080, 3130, 3388, 3443, 4235, 4382, 4840, 5008, 6160, 6260, 6776, 6886, 8470, 8764, 9680, 10955, 12520, 13552, 13772, 16940, 17215, 17528, 21910, 24101, 25040, 27544, 33880, 34430, 35056, 37873, 43820, 48202, 55088, 67760, 68860, 75746, 87640, 96404, 120505, 137720, 151492, 175280, 189365, 192808, 241010, 265111, 275440, 302984, 378730, 385616, 482020, 530222, 605968, 757460, 964040, 1060444, 1325555, 1514920, 1928080, 2120888, 2651110, 3029840, 4241776, 5302220, 10604440, 21208880]

約数ペア:

[(1, 21208880), (2, 10604440), (4, 5302220), (5, 4241776), (7, 3029840), (8, 2651110), (10, 2120888), (11, 1928080), (14, 1514920), (16, 1325555), (20, 1060444), (22, 964040), (28, 757460), (35, 605968), (40, 530222), (44, 482020), (55, 385616), (56, 378730), (70, 302984), (77, 275440), (80, 265111), (88, 241010), (110, 192808), (112, 189365), (121, 175280), (140, 151492), (154, 137720), (176, 120505), (220, 96404), (242, 87640), (280, 75746), (308, 68860), (313, 67760), (385, 55088), (440, 48202), (484, 43820), (560, 37873), (605, 35056), (616, 34430), (626, 33880), (770, 27544), (847, 25040), (880, 24101), (968, 21910), (1210, 17528), (1232, 17215), (1252, 16940), (1540, 13772), (1565, 13552), (1694, 12520), (1936, 10955), (2191, 9680), (2420, 8764), (2504, 8470), (3080, 6886), (3130, 6776), (3388, 6260), (3443, 6160), (4235, 5008), (4382, 4840)]