21989916

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2473}}^1$

素因数の和:2515

約数の個数: 72

約数和(自身を含む): 63037520

約数和(自身を除く): 41047604

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 19, 26, 36, 38, 39, 52, 57, 76, 78, 114, 117, 156, 171, 228, 234, 247, 342, 468, 494, 684, 741, 988, 1482, 2223, 2473, 2964, 4446, 4946, 7419, 8892, 9892, 14838, 22257, 29676, 32149, 44514, 46987, 64298, 89028, 93974, 96447, 128596, 140961, 187948, 192894, 281922, 289341, 385788, 422883, 563844, 578682, 610831, 845766, 1157364, 1221662, 1691532, 1832493, 2443324, 3664986, 5497479, 7329972, 10994958, 21989916]

約数ペア:

[(1, 21989916), (2, 10994958), (3, 7329972), (4, 5497479), (6, 3664986), (9, 2443324), (12, 1832493), (13, 1691532), (18, 1221662), (19, 1157364), (26, 845766), (36, 610831), (38, 578682), (39, 563844), (52, 422883), (57, 385788), (76, 289341), (78, 281922), (114, 192894), (117, 187948), (156, 140961), (171, 128596), (228, 96447), (234, 93974), (247, 89028), (342, 64298), (468, 46987), (494, 44514), (684, 32149), (741, 29676), (988, 22257), (1482, 14838), (2223, 9892), (2473, 8892), (2964, 7419), (4446, 4946)]