21315520

素因数分解:

$2^6\times 5^1\times {\mathrm{59}}^1\times {\mathrm{1129}}^1$

素因数の和:1205

約数の個数: 56

約数和(自身を含む): 51663600

約数和(自身を除く): 30348080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 59, 64, 80, 118, 160, 236, 295, 320, 472, 590, 944, 1129, 1180, 1888, 2258, 2360, 3776, 4516, 4720, 5645, 9032, 9440, 11290, 18064, 18880, 22580, 36128, 45160, 66611, 72256, 90320, 133222, 180640, 266444, 333055, 361280, 532888, 666110, 1065776, 1332220, 2131552, 2664440, 4263104, 5328880, 10657760, 21315520]

約数ペア:

[(1, 21315520), (2, 10657760), (4, 5328880), (5, 4263104), (8, 2664440), (10, 2131552), (16, 1332220), (20, 1065776), (32, 666110), (40, 532888), (59, 361280), (64, 333055), (80, 266444), (118, 180640), (160, 133222), (236, 90320), (295, 72256), (320, 66611), (472, 45160), (590, 36128), (944, 22580), (1129, 18880), (1180, 18064), (1888, 11290), (2258, 9440), (2360, 9032), (3776, 5645), (4516, 4720)]