20154640

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{619}}^1$

素因数の和:680

約数の個数: 80

約数和(自身を含む): 52585920

約数和(自身を除く): 32431280

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 37, 40, 44, 55, 74, 80, 88, 110, 148, 176, 185, 220, 296, 370, 407, 440, 592, 619, 740, 814, 880, 1238, 1480, 1628, 2035, 2476, 2960, 3095, 3256, 4070, 4952, 6190, 6512, 6809, 8140, 9904, 12380, 13618, 16280, 22903, 24760, 27236, 32560, 34045, 45806, 49520, 54472, 68090, 91612, 108944, 114515, 136180, 183224, 229030, 251933, 272360, 366448, 458060, 503866, 544720, 916120, 1007732, 1259665, 1832240, 2015464, 2519330, 4030928, 5038660, 10077320, 20154640]

約数ペア:

[(1, 20154640), (2, 10077320), (4, 5038660), (5, 4030928), (8, 2519330), (10, 2015464), (11, 1832240), (16, 1259665), (20, 1007732), (22, 916120), (37, 544720), (40, 503866), (44, 458060), (55, 366448), (74, 272360), (80, 251933), (88, 229030), (110, 183224), (148, 136180), (176, 114515), (185, 108944), (220, 91612), (296, 68090), (370, 54472), (407, 49520), (440, 45806), (592, 34045), (619, 32560), (740, 27236), (814, 24760), (880, 22903), (1238, 16280), (1480, 13618), (1628, 12380), (2035, 9904), (2476, 8140), (2960, 6809), (3095, 6512), (3256, 6190), (4070, 4952)]