18935440

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{251}}^1$

素因数の和:328

約数の個数: 80

約数和(自身を含む): 47246976

約数和(自身を除く): 28311536

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 41, 46, 80, 82, 92, 115, 164, 184, 205, 230, 251, 328, 368, 410, 460, 502, 656, 820, 920, 943, 1004, 1255, 1640, 1840, 1886, 2008, 2510, 3280, 3772, 4016, 4715, 5020, 5773, 7544, 9430, 10040, 10291, 11546, 15088, 18860, 20080, 20582, 23092, 28865, 37720, 41164, 46184, 51455, 57730, 75440, 82328, 92368, 102910, 115460, 164656, 205820, 230920, 236693, 411640, 461840, 473386, 823280, 946772, 1183465, 1893544, 2366930, 3787088, 4733860, 9467720, 18935440]

約数ペア:

[(1, 18935440), (2, 9467720), (4, 4733860), (5, 3787088), (8, 2366930), (10, 1893544), (16, 1183465), (20, 946772), (23, 823280), (40, 473386), (41, 461840), (46, 411640), (80, 236693), (82, 230920), (92, 205820), (115, 164656), (164, 115460), (184, 102910), (205, 92368), (230, 82328), (251, 75440), (328, 57730), (368, 51455), (410, 46184), (460, 41164), (502, 37720), (656, 28865), (820, 23092), (920, 20582), (943, 20080), (1004, 18860), (1255, 15088), (1640, 11546), (1840, 10291), (1886, 10040), (2008, 9430), (2510, 7544), (3280, 5773), (3772, 5020), (4016, 4715)]