21372918

素因数分解:

$2^1\times 3^1\times 7^2\times {\mathrm{139}}^1\times {\mathrm{523}}^1$

素因数の和:681

約数の個数: 48

約数和(自身を含む): 50178240

約数和(自身を除く): 28805322

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 139, 147, 278, 294, 417, 523, 834, 973, 1046, 1569, 1946, 2919, 3138, 3661, 5838, 6811, 7322, 10983, 13622, 20433, 21966, 25627, 40866, 51254, 72697, 76881, 145394, 153762, 218091, 436182, 508879, 1017758, 1526637, 3053274, 3562153, 7124306, 10686459, 21372918]

約数ペア:

[(1, 21372918), (2, 10686459), (3, 7124306), (6, 3562153), (7, 3053274), (14, 1526637), (21, 1017758), (42, 508879), (49, 436182), (98, 218091), (139, 153762), (147, 145394), (278, 76881), (294, 72697), (417, 51254), (523, 40866), (834, 25627), (973, 21966), (1046, 20433), (1569, 13622), (1946, 10983), (2919, 7322), (3138, 6811), (3661, 5838)]