21121120

素因数分解:

$2^5\times 5^1\times {\mathrm{101}}^1\times {\mathrm{1307}}^1$

素因数の和:1423

約数の個数: 48

約数和(自身を含む): 50431248

約数和(自身を除く): 29310128

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 101, 160, 202, 404, 505, 808, 1010, 1307, 1616, 2020, 2614, 3232, 4040, 5228, 6535, 8080, 10456, 13070, 16160, 20912, 26140, 41824, 52280, 104560, 132007, 209120, 264014, 528028, 660035, 1056056, 1320070, 2112112, 2640140, 4224224, 5280280, 10560560, 21121120]

約数ペア:

[(1, 21121120), (2, 10560560), (4, 5280280), (5, 4224224), (8, 2640140), (10, 2112112), (16, 1320070), (20, 1056056), (32, 660035), (40, 528028), (80, 264014), (101, 209120), (160, 132007), (202, 104560), (404, 52280), (505, 41824), (808, 26140), (1010, 20912), (1307, 16160), (1616, 13070), (2020, 10456), (2614, 8080), (3232, 6535), (4040, 5228)]