20647984

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{313}}^1$

素因数の和:378

約数の個数: 80

約数和(自身を含む): 49838080

約数和(自身を除く): 29190096

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 31, 38, 56, 62, 76, 112, 124, 133, 152, 217, 248, 266, 304, 313, 434, 496, 532, 589, 626, 868, 1064, 1178, 1252, 1736, 2128, 2191, 2356, 2504, 3472, 4123, 4382, 4712, 5008, 5947, 8246, 8764, 9424, 9703, 11894, 16492, 17528, 19406, 23788, 32984, 35056, 38812, 41629, 47576, 65968, 67921, 77624, 83258, 95152, 135842, 155248, 166516, 184357, 271684, 333032, 368714, 543368, 666064, 737428, 1086736, 1290499, 1474856, 2580998, 2949712, 5161996, 10323992, 20647984]

約数ペア:

[(1, 20647984), (2, 10323992), (4, 5161996), (7, 2949712), (8, 2580998), (14, 1474856), (16, 1290499), (19, 1086736), (28, 737428), (31, 666064), (38, 543368), (56, 368714), (62, 333032), (76, 271684), (112, 184357), (124, 166516), (133, 155248), (152, 135842), (217, 95152), (248, 83258), (266, 77624), (304, 67921), (313, 65968), (434, 47576), (496, 41629), (532, 38812), (589, 35056), (626, 32984), (868, 23788), (1064, 19406), (1178, 17528), (1252, 16492), (1736, 11894), (2128, 9703), (2191, 9424), (2356, 8764), (2504, 8246), (3472, 5947), (4123, 5008), (4382, 4712)]