20311893

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{239}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 35942400

約数和(自身を除く): 15630507

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 71, 133, 171, 213, 239, 399, 497, 639, 717, 1197, 1349, 1491, 1673, 2151, 4047, 4473, 4541, 5019, 9443, 12141, 13623, 15057, 16969, 28329, 31787, 40869, 50907, 84987, 95361, 118783, 152721, 286083, 322411, 356349, 967233, 1069047, 2256877, 2901699, 6770631, 20311893]

約数ペア:

[(1, 20311893), (3, 6770631), (7, 2901699), (9, 2256877), (19, 1069047), (21, 967233), (57, 356349), (63, 322411), (71, 286083), (133, 152721), (171, 118783), (213, 95361), (239, 84987), (399, 50907), (497, 40869), (639, 31787), (717, 28329), (1197, 16969), (1349, 15057), (1491, 13623), (1673, 12141), (2151, 9443), (4047, 5019), (4473, 4541)]