20918520

素因数分解:

$2^3\times 3^3\times 5^1\times 7^1\times {\mathrm{2767}}^1$

素因数の和:2794

約数の個数: 128

約数和(自身を含む): 79718400

約数和(自身を除く): 58799880

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 45, 54, 56, 60, 63, 70, 72, 84, 90, 105, 108, 120, 126, 135, 140, 168, 180, 189, 210, 216, 252, 270, 280, 315, 360, 378, 420, 504, 540, 630, 756, 840, 945, 1080, 1260, 1512, 1890, 2520, 2767, 3780, 5534, 7560, 8301, 11068, 13835, 16602, 19369, 22136, 24903, 27670, 33204, 38738, 41505, 49806, 55340, 58107, 66408, 74709, 77476, 83010, 96845, 99612, 110680, 116214, 124515, 149418, 154952, 166020, 174321, 193690, 199224, 232428, 249030, 290535, 298836, 332040, 348642, 373545, 387380, 464856, 498060, 522963, 581070, 597672, 697284, 747090, 774760, 871605, 996120, 1045926, 1162140, 1394568, 1494180, 1743210, 2091852, 2324280, 2614815, 2988360, 3486420, 4183704, 5229630, 6972840, 10459260, 20918520]

約数ペア:

[(1, 20918520), (2, 10459260), (3, 6972840), (4, 5229630), (5, 4183704), (6, 3486420), (7, 2988360), (8, 2614815), (9, 2324280), (10, 2091852), (12, 1743210), (14, 1494180), (15, 1394568), (18, 1162140), (20, 1045926), (21, 996120), (24, 871605), (27, 774760), (28, 747090), (30, 697284), (35, 597672), (36, 581070), (40, 522963), (42, 498060), (45, 464856), (54, 387380), (56, 373545), (60, 348642), (63, 332040), (70, 298836), (72, 290535), (84, 249030), (90, 232428), (105, 199224), (108, 193690), (120, 174321), (126, 166020), (135, 154952), (140, 149418), (168, 124515), (180, 116214), (189, 110680), (210, 99612), (216, 96845), (252, 83010), (270, 77476), (280, 74709), (315, 66408), (360, 58107), (378, 55340), (420, 49806), (504, 41505), (540, 38738), (630, 33204), (756, 27670), (840, 24903), (945, 22136), (1080, 19369), (1260, 16602), (1512, 13835), (1890, 11068), (2520, 8301), (2767, 7560), (3780, 5534)]