21343916

素因数分解:

$2^2\times {\mathrm{11}}^3\times {\mathrm{19}}^1\times {\mathrm{211}}^1$

素因数の和:267

約数の個数: 48

約数和(自身を含む): 43451520

約数和(自身を除く): 22107604

約数列:

[1, 2, 4, 11, 19, 22, 38, 44, 76, 121, 209, 211, 242, 418, 422, 484, 836, 844, 1331, 2299, 2321, 2662, 4009, 4598, 4642, 5324, 8018, 9196, 9284, 16036, 25289, 25531, 44099, 50578, 51062, 88198, 101156, 102124, 176396, 280841, 485089, 561682, 970178, 1123364, 1940356, 5335979, 10671958, 21343916]

約数ペア:

[(1, 21343916), (2, 10671958), (4, 5335979), (11, 1940356), (19, 1123364), (22, 970178), (38, 561682), (44, 485089), (76, 280841), (121, 176396), (209, 102124), (211, 101156), (242, 88198), (418, 51062), (422, 50578), (484, 44099), (836, 25531), (844, 25289), (1331, 16036), (2299, 9284), (2321, 9196), (2662, 8018), (4009, 5324), (4598, 4642)]