20785947

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{149}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 35431200

約数和(自身を除く): 14645253

約数列:

[1, 3, 7, 13, 21, 39, 49, 73, 91, 147, 149, 219, 273, 447, 511, 637, 949, 1043, 1533, 1911, 1937, 2847, 3129, 3577, 5811, 6643, 7301, 10731, 10877, 13559, 19929, 21903, 32631, 40677, 46501, 76139, 94913, 139503, 141401, 228417, 284739, 424203, 532973, 989807, 1598919, 2969421, 6928649, 20785947]

約数ペア:

[(1, 20785947), (3, 6928649), (7, 2969421), (13, 1598919), (21, 989807), (39, 532973), (49, 424203), (73, 284739), (91, 228417), (147, 141401), (149, 139503), (219, 94913), (273, 76139), (447, 46501), (511, 40677), (637, 32631), (949, 21903), (1043, 19929), (1533, 13559), (1911, 10877), (1937, 10731), (2847, 7301), (3129, 6643), (3577, 5811)]