81814720

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{277}}^1$

素因数の和:378

約数の個数: 112

約数和(自身を含む): 213530688

約数和(自身を除く): 131715968

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 71, 80, 104, 130, 142, 160, 208, 260, 277, 284, 320, 355, 416, 520, 554, 568, 710, 832, 923, 1040, 1108, 1136, 1385, 1420, 1846, 2080, 2216, 2272, 2770, 2840, 3601, 3692, 4160, 4432, 4544, 4615, 5540, 5680, 7202, 7384, 8864, 9230, 11080, 11360, 14404, 14768, 17728, 18005, 18460, 19667, 22160, 22720, 28808, 29536, 36010, 36920, 39334, 44320, 57616, 59072, 72020, 73840, 78668, 88640, 98335, 115232, 144040, 147680, 157336, 196670, 230464, 255671, 288080, 295360, 314672, 393340, 511342, 576160, 629344, 786680, 1022684, 1152320, 1258688, 1278355, 1573360, 2045368, 2556710, 3146720, 4090736, 5113420, 6293440, 8181472, 10226840, 16362944, 20453680, 40907360, 81814720]

約数ペア:

[(1, 81814720), (2, 40907360), (4, 20453680), (5, 16362944), (8, 10226840), (10, 8181472), (13, 6293440), (16, 5113420), (20, 4090736), (26, 3146720), (32, 2556710), (40, 2045368), (52, 1573360), (64, 1278355), (65, 1258688), (71, 1152320), (80, 1022684), (104, 786680), (130, 629344), (142, 576160), (160, 511342), (208, 393340), (260, 314672), (277, 295360), (284, 288080), (320, 255671), (355, 230464), (416, 196670), (520, 157336), (554, 147680), (568, 144040), (710, 115232), (832, 98335), (923, 88640), (1040, 78668), (1108, 73840), (1136, 72020), (1385, 59072), (1420, 57616), (1846, 44320), (2080, 39334), (2216, 36920), (2272, 36010), (2770, 29536), (2840, 28808), (3601, 22720), (3692, 22160), (4160, 19667), (4432, 18460), (4544, 18005), (4615, 17728), (5540, 14768), (5680, 14404), (7202, 11360), (7384, 11080), (8864, 9230)]