21085722

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2357}}^1$

素因数の和:2443

約数の個数: 48

約数和(自身を含む): 52970112

約数和(自身を除く): 31884390

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 71, 126, 142, 213, 426, 497, 639, 994, 1278, 1491, 2357, 2982, 4473, 4714, 7071, 8946, 14142, 16499, 21213, 32998, 42426, 49497, 98994, 148491, 167347, 296982, 334694, 502041, 1004082, 1171429, 1506123, 2342858, 3012246, 3514287, 7028574, 10542861, 21085722]

約数ペア:

[(1, 21085722), (2, 10542861), (3, 7028574), (6, 3514287), (7, 3012246), (9, 2342858), (14, 1506123), (18, 1171429), (21, 1004082), (42, 502041), (63, 334694), (71, 296982), (126, 167347), (142, 148491), (213, 98994), (426, 49497), (497, 42426), (639, 32998), (994, 21213), (1278, 16499), (1491, 14142), (2357, 8946), (2982, 7071), (4473, 4714)]