20977568

素因数分解:

$2^5\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{271}}^1$

素因数の和:381

約数の個数: 48

約数和(自身を含む): 43182720

約数和(自身を除く): 22205152

約数列:

[1, 2, 4, 8, 16, 32, 41, 59, 82, 118, 164, 236, 271, 328, 472, 542, 656, 944, 1084, 1312, 1888, 2168, 2419, 4336, 4838, 8672, 9676, 11111, 15989, 19352, 22222, 31978, 38704, 44444, 63956, 77408, 88888, 127912, 177776, 255824, 355552, 511648, 655549, 1311098, 2622196, 5244392, 10488784, 20977568]

約数ペア:

[(1, 20977568), (2, 10488784), (4, 5244392), (8, 2622196), (16, 1311098), (32, 655549), (41, 511648), (59, 355552), (82, 255824), (118, 177776), (164, 127912), (236, 88888), (271, 77408), (328, 63956), (472, 44444), (542, 38704), (656, 31978), (944, 22222), (1084, 19352), (1312, 15989), (1888, 11111), (2168, 9676), (2419, 8672), (4336, 4838)]