21087976

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{349}}^1$

素因数の和:458

約数の個数: 64

約数和(自身を含む): 49392000

約数和(自身を除く): 28304024

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 83, 91, 104, 166, 182, 332, 349, 364, 581, 664, 698, 728, 1079, 1162, 1396, 2158, 2324, 2443, 2792, 4316, 4537, 4648, 4886, 7553, 8632, 9074, 9772, 15106, 18148, 19544, 28967, 30212, 31759, 36296, 57934, 60424, 63518, 115868, 127036, 202769, 231736, 254072, 376571, 405538, 753142, 811076, 1506284, 1622152, 2635997, 3012568, 5271994, 10543988, 21087976]

約数ペア:

[(1, 21087976), (2, 10543988), (4, 5271994), (7, 3012568), (8, 2635997), (13, 1622152), (14, 1506284), (26, 811076), (28, 753142), (52, 405538), (56, 376571), (83, 254072), (91, 231736), (104, 202769), (166, 127036), (182, 115868), (332, 63518), (349, 60424), (364, 57934), (581, 36296), (664, 31759), (698, 30212), (728, 28967), (1079, 19544), (1162, 18148), (1396, 15106), (2158, 9772), (2324, 9074), (2443, 8632), (2792, 7553), (4316, 4886), (4537, 4648)]