18419440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{199}}^1$

素因数の和:314

約数の個数: 80

約数和(自身を含む): 46872000

約数和(自身を除く): 28452560

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 89, 104, 130, 178, 199, 208, 260, 356, 398, 445, 520, 712, 796, 890, 995, 1040, 1157, 1424, 1592, 1780, 1990, 2314, 2587, 3184, 3560, 3980, 4628, 5174, 5785, 7120, 7960, 9256, 10348, 11570, 12935, 15920, 17711, 18512, 20696, 23140, 25870, 35422, 41392, 46280, 51740, 70844, 88555, 92560, 103480, 141688, 177110, 206960, 230243, 283376, 354220, 460486, 708440, 920972, 1151215, 1416880, 1841944, 2302430, 3683888, 4604860, 9209720, 18419440]

約数ペア:

[(1, 18419440), (2, 9209720), (4, 4604860), (5, 3683888), (8, 2302430), (10, 1841944), (13, 1416880), (16, 1151215), (20, 920972), (26, 708440), (40, 460486), (52, 354220), (65, 283376), (80, 230243), (89, 206960), (104, 177110), (130, 141688), (178, 103480), (199, 92560), (208, 88555), (260, 70844), (356, 51740), (398, 46280), (445, 41392), (520, 35422), (712, 25870), (796, 23140), (890, 20696), (995, 18512), (1040, 17711), (1157, 15920), (1424, 12935), (1592, 11570), (1780, 10348), (1990, 9256), (2314, 7960), (2587, 7120), (3184, 5785), (3560, 5174), (3980, 4628)]