19997538

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{431}}^1$

素因数の和:503

約数の個数: 64

約数和(自身を含む): 47278080

約数和(自身を除く): 27280542

約数列:

[1, 2, 3, 6, 11, 19, 22, 33, 37, 38, 57, 66, 74, 111, 114, 209, 222, 407, 418, 431, 627, 703, 814, 862, 1221, 1254, 1293, 1406, 2109, 2442, 2586, 4218, 4741, 7733, 8189, 9482, 14223, 15466, 15947, 16378, 23199, 24567, 28446, 31894, 46398, 47841, 49134, 90079, 95682, 175417, 180158, 270237, 302993, 350834, 526251, 540474, 605986, 908979, 1052502, 1817958, 3332923, 6665846, 9998769, 19997538]

約数ペア:

[(1, 19997538), (2, 9998769), (3, 6665846), (6, 3332923), (11, 1817958), (19, 1052502), (22, 908979), (33, 605986), (37, 540474), (38, 526251), (57, 350834), (66, 302993), (74, 270237), (111, 180158), (114, 175417), (209, 95682), (222, 90079), (407, 49134), (418, 47841), (431, 46398), (627, 31894), (703, 28446), (814, 24567), (862, 23199), (1221, 16378), (1254, 15947), (1293, 15466), (1406, 14223), (2109, 9482), (2442, 8189), (2586, 7733), (4218, 4741)]