21498128

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{487}}^1$

素因数の和:615

約数の個数: 40

約数和(自身を含む): 43568640

約数和(自身を除く): 22070512

約数列:

[1, 2, 4, 8, 16, 31, 62, 89, 124, 178, 248, 356, 487, 496, 712, 974, 1424, 1948, 2759, 3896, 5518, 7792, 11036, 15097, 22072, 30194, 43343, 44144, 60388, 86686, 120776, 173372, 241552, 346744, 693488, 1343633, 2687266, 5374532, 10749064, 21498128]

約数ペア:

[(1, 21498128), (2, 10749064), (4, 5374532), (8, 2687266), (16, 1343633), (31, 693488), (62, 346744), (89, 241552), (124, 173372), (178, 120776), (248, 86686), (356, 60388), (487, 44144), (496, 43343), (712, 30194), (974, 22072), (1424, 15097), (1948, 11036), (2759, 7792), (3896, 5518)]