20582720

素因数分解:

$2^6\times 5^1\times {\mathrm{131}}^1\times {\mathrm{491}}^1$

素因数の和:639

約数の個数: 56

約数和(自身を含む): 49487328

約数和(自身を除く): 28904608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 131, 160, 262, 320, 491, 524, 655, 982, 1048, 1310, 1964, 2096, 2455, 2620, 3928, 4192, 4910, 5240, 7856, 8384, 9820, 10480, 15712, 19640, 20960, 31424, 39280, 41920, 64321, 78560, 128642, 157120, 257284, 321605, 514568, 643210, 1029136, 1286420, 2058272, 2572840, 4116544, 5145680, 10291360, 20582720]

約数ペア:

[(1, 20582720), (2, 10291360), (4, 5145680), (5, 4116544), (8, 2572840), (10, 2058272), (16, 1286420), (20, 1029136), (32, 643210), (40, 514568), (64, 321605), (80, 257284), (131, 157120), (160, 128642), (262, 78560), (320, 64321), (491, 41920), (524, 39280), (655, 31424), (982, 20960), (1048, 19640), (1310, 15712), (1964, 10480), (2096, 9820), (2455, 8384), (2620, 7856), (3928, 5240), (4192, 4910)]