640870139

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{181}}^1$

素因数の和:328

約数の個数: 48

約数和(自身を含む): 828120384

約数和(自身を除く): 187250245

約数列:

[1, 7, 13, 41, 73, 91, 169, 181, 287, 511, 533, 949, 1183, 1267, 2353, 2993, 3731, 6643, 6929, 7421, 12337, 13213, 16471, 20951, 30589, 38909, 48503, 51947, 86359, 92491, 96473, 171769, 214123, 272363, 505817, 541733, 675311, 1202383, 1254149, 2232997, 3540719, 3792131, 7042529, 8779043, 15630979, 49297703, 91552877, 640870139]

約数ペア:

[(1, 640870139), (7, 91552877), (13, 49297703), (41, 15630979), (73, 8779043), (91, 7042529), (169, 3792131), (181, 3540719), (287, 2232997), (511, 1254149), (533, 1202383), (949, 675311), (1183, 541733), (1267, 505817), (2353, 272363), (2993, 214123), (3731, 171769), (6643, 96473), (6929, 92491), (7421, 86359), (12337, 51947), (13213, 48503), (16471, 38909), (20951, 30589)]