20819288.000000000

素因数分解:

$2^8\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1399}}^1$

素因数の和:1465

約数の個数: 72

約数和(自身を含む): 251820800

約数和(自身を除く): 144019456

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 43, 56, 64, 86, 112, 128, 172, 224, 256, 301, 344, 448, 602, 688, 896, 1204, 1376, 1399, 1792, 2408, 2752, 2798, 4816, 5504, 5596, 9632, 9793, 11008, 11192, 19264, 19586, 22384, 38528, 39172, 44768, 60157, 77056, 78344, 89536, 120314, 156688, 179072, 240628, 313376, 358144, 421099, 481256, 626752, 842198, 962512, 1253504, 1684396, 1925024, 2507008, 3368792, 3850048, 6737584, 7700096, 13475168, 15400192, 26950336, 53900672, 107801344]

約数ペア:

[(1, 107801344), (2, 53900672), (4, 26950336), (7, 15400192), (8, 13475168), (14, 7700096), (16, 6737584), (28, 3850048), (32, 3368792), (43, 2507008), (56, 1925024), (64, 1684396), (86, 1253504), (112, 962512), (128, 842198), (172, 626752), (224, 481256), (256, 421099), (301, 358144), (344, 313376), (448, 240628), (602, 179072), (688, 156688), (896, 120314), (1204, 89536), (1376, 78344), (1399, 77056), (1792, 60157), (2408, 44768), (2752, 39172), (2798, 38528), (4816, 22384), (5504, 19586), (5596, 19264), (9632, 11192), (9793, 11008)]