20581712

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{857}}^1$

素因数の和:963

約数の個数: 40

約数和(自身を含む): 42556800

約数和(自身を除く): 21975088

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 79, 152, 158, 304, 316, 632, 857, 1264, 1501, 1714, 3002, 3428, 6004, 6856, 12008, 13712, 16283, 24016, 32566, 65132, 67703, 130264, 135406, 260528, 270812, 541624, 1083248, 1286357, 2572714, 5145428, 10290856, 20581712]

約数ペア:

[(1, 20581712), (2, 10290856), (4, 5145428), (8, 2572714), (16, 1286357), (19, 1083248), (38, 541624), (76, 270812), (79, 260528), (152, 135406), (158, 130264), (304, 67703), (316, 65132), (632, 32566), (857, 24016), (1264, 16283), (1501, 13712), (1714, 12008), (3002, 6856), (3428, 6004)]