18901155

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{227}}^1$

素因数の和:316

約数の個数: 64

約数和(自身を含む): 37997568

約数和(自身を除く): 19096413

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 61, 65, 91, 105, 183, 195, 227, 273, 305, 427, 455, 681, 793, 915, 1135, 1281, 1365, 1589, 2135, 2379, 2951, 3405, 3965, 4767, 5551, 6405, 7945, 8853, 11895, 13847, 14755, 16653, 20657, 23835, 27755, 41541, 44265, 61971, 69235, 83265, 96929, 103285, 180011, 207705, 290787, 309855, 484645, 540033, 900055, 1260077, 1453935, 2700165, 3780231, 6300385, 18901155]

約数ペア:

[(1, 18901155), (3, 6300385), (5, 3780231), (7, 2700165), (13, 1453935), (15, 1260077), (21, 900055), (35, 540033), (39, 484645), (61, 309855), (65, 290787), (91, 207705), (105, 180011), (183, 103285), (195, 96929), (227, 83265), (273, 69235), (305, 61971), (427, 44265), (455, 41541), (681, 27755), (793, 23835), (915, 20657), (1135, 16653), (1281, 14755), (1365, 13847), (1589, 11895), (2135, 8853), (2379, 7945), (2951, 6405), (3405, 5551), (3965, 4767)]