21243365

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1$

素因数の和:150

約数の個数: 48

約数和(自身を含む): 31415664

約数和(自身を除く): 10172299

約数列:

[1, 5, 11, 13, 37, 55, 65, 73, 121, 143, 185, 365, 407, 481, 605, 715, 803, 949, 1573, 2035, 2405, 2701, 4015, 4477, 4745, 5291, 7865, 8833, 10439, 13505, 22385, 26455, 29711, 35113, 44165, 52195, 58201, 114829, 148555, 175565, 291005, 326821, 386243, 574145, 1634105, 1931215, 4248673, 21243365]

約数ペア:

[(1, 21243365), (5, 4248673), (11, 1931215), (13, 1634105), (37, 574145), (55, 386243), (65, 326821), (73, 291005), (121, 175565), (143, 148555), (185, 114829), (365, 58201), (407, 52195), (481, 44165), (605, 35113), (715, 29711), (803, 26455), (949, 22385), (1573, 13505), (2035, 10439), (2405, 8833), (2701, 7865), (4015, 5291), (4477, 4745)]