81209680

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{211}}^1\times {\mathrm{283}}^1$

素因数の和:524

約数の個数: 80

約数和(自身を含む): 201576384

約数和(自身を除く): 120366704

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 211, 272, 283, 340, 422, 566, 680, 844, 1055, 1132, 1360, 1415, 1688, 2110, 2264, 2830, 3376, 3587, 4220, 4528, 4811, 5660, 7174, 8440, 9622, 11320, 14348, 16880, 17935, 19244, 22640, 24055, 28696, 35870, 38488, 48110, 57392, 59713, 71740, 76976, 96220, 119426, 143480, 192440, 238852, 286960, 298565, 384880, 477704, 597130, 955408, 1015121, 1194260, 2030242, 2388520, 4060484, 4777040, 5075605, 8120968, 10151210, 16241936, 20302420, 40604840, 81209680]

約数ペア:

[(1, 81209680), (2, 40604840), (4, 20302420), (5, 16241936), (8, 10151210), (10, 8120968), (16, 5075605), (17, 4777040), (20, 4060484), (34, 2388520), (40, 2030242), (68, 1194260), (80, 1015121), (85, 955408), (136, 597130), (170, 477704), (211, 384880), (272, 298565), (283, 286960), (340, 238852), (422, 192440), (566, 143480), (680, 119426), (844, 96220), (1055, 76976), (1132, 71740), (1360, 59713), (1415, 57392), (1688, 48110), (2110, 38488), (2264, 35870), (2830, 28696), (3376, 24055), (3587, 22640), (4220, 19244), (4528, 17935), (4811, 16880), (5660, 14348), (7174, 11320), (8440, 9622)]