81579720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1\times {\mathrm{127}}^1$

素因数の和:295

約数の個数: 128

約数和(自身を含む): 253808640

約数和(自身を除く): 172228920

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 53, 60, 101, 106, 120, 127, 159, 202, 212, 254, 265, 303, 318, 381, 404, 424, 505, 508, 530, 606, 635, 636, 762, 795, 808, 1010, 1016, 1060, 1212, 1270, 1272, 1515, 1524, 1590, 1905, 2020, 2120, 2424, 2540, 3030, 3048, 3180, 3810, 4040, 5080, 5353, 6060, 6360, 6731, 7620, 10706, 12120, 12827, 13462, 15240, 16059, 20193, 21412, 25654, 26765, 26924, 32118, 33655, 38481, 40386, 42824, 51308, 53530, 53848, 64135, 64236, 67310, 76962, 80295, 80772, 100965, 102616, 107060, 128270, 128472, 134620, 153924, 160590, 161544, 192405, 201930, 214120, 256540, 269240, 307848, 321180, 384810, 403860, 513080, 642360, 679831, 769620, 807720, 1359662, 1539240, 2039493, 2719324, 3399155, 4078986, 5438648, 6798310, 8157972, 10197465, 13596620, 16315944, 20394930, 27193240, 40789860, 81579720]

約数ペア:

[(1, 81579720), (2, 40789860), (3, 27193240), (4, 20394930), (5, 16315944), (6, 13596620), (8, 10197465), (10, 8157972), (12, 6798310), (15, 5438648), (20, 4078986), (24, 3399155), (30, 2719324), (40, 2039493), (53, 1539240), (60, 1359662), (101, 807720), (106, 769620), (120, 679831), (127, 642360), (159, 513080), (202, 403860), (212, 384810), (254, 321180), (265, 307848), (303, 269240), (318, 256540), (381, 214120), (404, 201930), (424, 192405), (505, 161544), (508, 160590), (530, 153924), (606, 134620), (635, 128472), (636, 128270), (762, 107060), (795, 102616), (808, 100965), (1010, 80772), (1016, 80295), (1060, 76962), (1212, 67310), (1270, 64236), (1272, 64135), (1515, 53848), (1524, 53530), (1590, 51308), (1905, 42824), (2020, 40386), (2120, 38481), (2424, 33655), (2540, 32118), (3030, 26924), (3048, 26765), (3180, 25654), (3810, 21412), (4040, 20193), (5080, 16059), (5353, 15240), (6060, 13462), (6360, 12827), (6731, 12120), (7620, 10706)]