81808240

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{173}}^1\times {\mathrm{257}}^1$

素因数の和:466

約数の個数: 80

約数和(自身を含む): 200397888

約数和(自身を除く): 118589648

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 173, 184, 230, 257, 346, 368, 460, 514, 692, 865, 920, 1028, 1285, 1384, 1730, 1840, 2056, 2570, 2768, 3460, 3979, 4112, 5140, 5911, 6920, 7958, 10280, 11822, 13840, 15916, 19895, 20560, 23644, 29555, 31832, 39790, 44461, 47288, 59110, 63664, 79580, 88922, 94576, 118220, 159160, 177844, 222305, 236440, 318320, 355688, 444610, 472880, 711376, 889220, 1022603, 1778440, 2045206, 3556880, 4090412, 5113015, 8180824, 10226030, 16361648, 20452060, 40904120, 81808240]

約数ペア:

[(1, 81808240), (2, 40904120), (4, 20452060), (5, 16361648), (8, 10226030), (10, 8180824), (16, 5113015), (20, 4090412), (23, 3556880), (40, 2045206), (46, 1778440), (80, 1022603), (92, 889220), (115, 711376), (173, 472880), (184, 444610), (230, 355688), (257, 318320), (346, 236440), (368, 222305), (460, 177844), (514, 159160), (692, 118220), (865, 94576), (920, 88922), (1028, 79580), (1285, 63664), (1384, 59110), (1730, 47288), (1840, 44461), (2056, 39790), (2570, 31832), (2768, 29555), (3460, 23644), (3979, 20560), (4112, 19895), (5140, 15916), (5911, 13840), (6920, 11822), (7958, 10280)]