81217140

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{229}}^1\times {\mathrm{257}}^1$

素因数の和:521

約数の個数: 96

約数和(自身を含む): 239258880

約数和(自身を除く): 158041740

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 23, 30, 46, 60, 69, 92, 115, 138, 229, 230, 257, 276, 345, 458, 460, 514, 687, 690, 771, 916, 1028, 1145, 1285, 1374, 1380, 1542, 2290, 2570, 2748, 3084, 3435, 3855, 4580, 5140, 5267, 5911, 6870, 7710, 10534, 11822, 13740, 15420, 15801, 17733, 21068, 23644, 26335, 29555, 31602, 35466, 52670, 58853, 59110, 63204, 70932, 79005, 88665, 105340, 117706, 118220, 158010, 176559, 177330, 235412, 294265, 316020, 353118, 354660, 588530, 706236, 882795, 1177060, 1353619, 1765590, 2707238, 3531180, 4060857, 5414476, 6768095, 8121714, 13536190, 16243428, 20304285, 27072380, 40608570, 81217140]

約数ペア:

[(1, 81217140), (2, 40608570), (3, 27072380), (4, 20304285), (5, 16243428), (6, 13536190), (10, 8121714), (12, 6768095), (15, 5414476), (20, 4060857), (23, 3531180), (30, 2707238), (46, 1765590), (60, 1353619), (69, 1177060), (92, 882795), (115, 706236), (138, 588530), (229, 354660), (230, 353118), (257, 316020), (276, 294265), (345, 235412), (458, 177330), (460, 176559), (514, 158010), (687, 118220), (690, 117706), (771, 105340), (916, 88665), (1028, 79005), (1145, 70932), (1285, 63204), (1374, 59110), (1380, 58853), (1542, 52670), (2290, 35466), (2570, 31602), (2748, 29555), (3084, 26335), (3435, 23644), (3855, 21068), (4580, 17733), (5140, 15801), (5267, 15420), (5911, 13740), (6870, 11822), (7710, 10534)]