20985804

素因数分解:

$2^2\times 3^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{487}}^1$

素因数の和:529

約数の個数: 120

約数和(自身を含む): 66133760

約数和(自身を除く): 45147956

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 19, 21, 27, 28, 36, 38, 42, 54, 57, 63, 76, 81, 84, 108, 114, 126, 133, 162, 171, 189, 228, 252, 266, 324, 342, 378, 399, 487, 513, 532, 567, 684, 756, 798, 974, 1026, 1134, 1197, 1461, 1539, 1596, 1948, 2052, 2268, 2394, 2922, 3078, 3409, 3591, 4383, 4788, 5844, 6156, 6818, 7182, 8766, 9253, 10227, 10773, 13149, 13636, 14364, 17532, 18506, 20454, 21546, 26298, 27759, 30681, 37012, 39447, 40908, 43092, 52596, 55518, 61362, 64771, 78894, 83277, 92043, 111036, 122724, 129542, 157788, 166554, 184086, 194313, 249831, 259084, 276129, 333108, 368172, 388626, 499662, 552258, 582939, 749493, 777252, 999324, 1104516, 1165878, 1498986, 1748817, 2331756, 2997972, 3497634, 5246451, 6995268, 10492902, 20985804]

約数ペア:

[(1, 20985804), (2, 10492902), (3, 6995268), (4, 5246451), (6, 3497634), (7, 2997972), (9, 2331756), (12, 1748817), (14, 1498986), (18, 1165878), (19, 1104516), (21, 999324), (27, 777252), (28, 749493), (36, 582939), (38, 552258), (42, 499662), (54, 388626), (57, 368172), (63, 333108), (76, 276129), (81, 259084), (84, 249831), (108, 194313), (114, 184086), (126, 166554), (133, 157788), (162, 129542), (171, 122724), (189, 111036), (228, 92043), (252, 83277), (266, 78894), (324, 64771), (342, 61362), (378, 55518), (399, 52596), (487, 43092), (513, 40908), (532, 39447), (567, 37012), (684, 30681), (756, 27759), (798, 26298), (974, 21546), (1026, 20454), (1134, 18506), (1197, 17532), (1461, 14364), (1539, 13636), (1596, 13149), (1948, 10773), (2052, 10227), (2268, 9253), (2394, 8766), (2922, 7182), (3078, 6818), (3409, 6156), (3591, 5844), (4383, 4788)]