217721855

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{191}}^1$

素因数の和:312

約数の個数: 48

約数和(自身を含む): 303575040

約数和(自身を除く): 85853185

約数列:

[1, 5, 13, 19, 65, 71, 95, 169, 191, 247, 355, 845, 923, 955, 1235, 1349, 2483, 3211, 3629, 4615, 6745, 11999, 12415, 13561, 16055, 17537, 18145, 32279, 47177, 59995, 67805, 87685, 161395, 176293, 227981, 235885, 257659, 613301, 881465, 1139905, 1288295, 2291809, 3066505, 3349567, 11459045, 16747835, 43544371, 217721855]

約数ペア:

[(1, 217721855), (5, 43544371), (13, 16747835), (19, 11459045), (65, 3349567), (71, 3066505), (95, 2291809), (169, 1288295), (191, 1139905), (247, 881465), (355, 613301), (845, 257659), (923, 235885), (955, 227981), (1235, 176293), (1349, 161395), (2483, 87685), (3211, 67805), (3629, 59995), (4615, 47177), (6745, 32279), (11999, 18145), (12415, 17537), (13561, 16055)]