21165440

素因数分解:

$2^7\times 5^1\times {\mathrm{33071}}^1$

素因数の和:33090

約数の個数: 32

約数和(自身を含む): 50600160

約数和(自身を除く): 29434720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33071, 66142, 132284, 165355, 264568, 330710, 529136, 661420, 1058272, 1322840, 2116544, 2645680, 4233088, 5291360, 10582720, 21165440]

約数ペア:

[(1, 21165440), (2, 10582720), (4, 5291360), (5, 4233088), (8, 2645680), (10, 2116544), (16, 1322840), (20, 1058272), (32, 661420), (40, 529136), (64, 330710), (80, 264568), (128, 165355), (160, 132284), (320, 66142), (640, 33071)]