21646720

素因数分解:

$2^7\times 5^1\times {\mathrm{149}}^1\times {\mathrm{227}}^1$

素因数の和:395

約数の個数: 64

約数和(自身を含む): 52326000

約数和(自身を除く): 30679280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 149, 160, 227, 298, 320, 454, 596, 640, 745, 908, 1135, 1192, 1490, 1816, 2270, 2384, 2980, 3632, 4540, 4768, 5960, 7264, 9080, 9536, 11920, 14528, 18160, 19072, 23840, 29056, 33823, 36320, 47680, 67646, 72640, 95360, 135292, 145280, 169115, 270584, 338230, 541168, 676460, 1082336, 1352920, 2164672, 2705840, 4329344, 5411680, 10823360, 21646720]

約数ペア:

[(1, 21646720), (2, 10823360), (4, 5411680), (5, 4329344), (8, 2705840), (10, 2164672), (16, 1352920), (20, 1082336), (32, 676460), (40, 541168), (64, 338230), (80, 270584), (128, 169115), (149, 145280), (160, 135292), (227, 95360), (298, 72640), (320, 67646), (454, 47680), (596, 36320), (640, 33823), (745, 29056), (908, 23840), (1135, 19072), (1192, 18160), (1490, 14528), (1816, 11920), (2270, 9536), (2384, 9080), (2980, 7264), (3632, 5960), (4540, 4768)]