20565545

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{587}}^1$

素因数の和:630

約数の個数: 48

約数和(自身を含む): 33784128

約数和(自身を除く): 13218583

約数列:

[1, 5, 7, 11, 13, 35, 49, 55, 65, 77, 91, 143, 245, 385, 455, 539, 587, 637, 715, 1001, 2695, 2935, 3185, 4109, 5005, 6457, 7007, 7631, 20545, 28763, 32285, 35035, 38155, 45199, 53417, 83941, 143815, 225995, 267085, 316393, 373919, 419705, 587587, 1581965, 1869595, 2937935, 4113109, 20565545]

約数ペア:

[(1, 20565545), (5, 4113109), (7, 2937935), (11, 1869595), (13, 1581965), (35, 587587), (49, 419705), (55, 373919), (65, 316393), (77, 267085), (91, 225995), (143, 143815), (245, 83941), (385, 53417), (455, 45199), (539, 38155), (587, 35035), (637, 32285), (715, 28763), (1001, 20545), (2695, 7631), (2935, 7007), (3185, 6457), (4109, 5005)]