19789880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{1097}}^1$

素因数の和:1160

約数の個数: 64

約数和(自身を含む): 49805280

約数和(自身を除く): 30015400

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 41, 44, 55, 82, 88, 110, 164, 205, 220, 328, 410, 440, 451, 820, 902, 1097, 1640, 1804, 2194, 2255, 3608, 4388, 4510, 5485, 8776, 9020, 10970, 12067, 18040, 21940, 24134, 43880, 44977, 48268, 60335, 89954, 96536, 120670, 179908, 224885, 241340, 359816, 449770, 482680, 494747, 899540, 989494, 1799080, 1978988, 2473735, 3957976, 4947470, 9894940, 19789880]

約数ペア:

[(1, 19789880), (2, 9894940), (4, 4947470), (5, 3957976), (8, 2473735), (10, 1978988), (11, 1799080), (20, 989494), (22, 899540), (40, 494747), (41, 482680), (44, 449770), (55, 359816), (82, 241340), (88, 224885), (110, 179908), (164, 120670), (205, 96536), (220, 89954), (328, 60335), (410, 48268), (440, 44977), (451, 43880), (820, 24134), (902, 21940), (1097, 18040), (1640, 12067), (1804, 10970), (2194, 9020), (2255, 8776), (3608, 5485), (4388, 4510)]