18700880

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{269}}^1$

素因数の和:372

約数の個数: 80

約数和(自身を含む): 48211200

約数和(自身を除く): 29510320

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 79, 80, 88, 110, 158, 176, 220, 269, 316, 395, 440, 538, 632, 790, 869, 880, 1076, 1264, 1345, 1580, 1738, 2152, 2690, 2959, 3160, 3476, 4304, 4345, 5380, 5918, 6320, 6952, 8690, 10760, 11836, 13904, 14795, 17380, 21251, 21520, 23672, 29590, 34760, 42502, 47344, 59180, 69520, 85004, 106255, 118360, 170008, 212510, 233761, 236720, 340016, 425020, 467522, 850040, 935044, 1168805, 1700080, 1870088, 2337610, 3740176, 4675220, 9350440, 18700880]

約数ペア:

[(1, 18700880), (2, 9350440), (4, 4675220), (5, 3740176), (8, 2337610), (10, 1870088), (11, 1700080), (16, 1168805), (20, 935044), (22, 850040), (40, 467522), (44, 425020), (55, 340016), (79, 236720), (80, 233761), (88, 212510), (110, 170008), (158, 118360), (176, 106255), (220, 85004), (269, 69520), (316, 59180), (395, 47344), (440, 42502), (538, 34760), (632, 29590), (790, 23672), (869, 21520), (880, 21251), (1076, 17380), (1264, 14795), (1345, 13904), (1580, 11836), (1738, 10760), (2152, 8690), (2690, 6952), (2959, 6320), (3160, 5918), (3476, 5380), (4304, 4345)]