21217924

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{821}}^1$

素因数の和:916

約数の個数: 48

約数和(自身を含む): 46400256

約数和(自身を除く): 25182332

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 71, 91, 142, 182, 284, 364, 497, 821, 923, 994, 1642, 1846, 1988, 3284, 3692, 5747, 6461, 10673, 11494, 12922, 21346, 22988, 25844, 42692, 58291, 74711, 116582, 149422, 233164, 298844, 408037, 757783, 816074, 1515566, 1632148, 3031132, 5304481, 10608962, 21217924]

約数ペア:

[(1, 21217924), (2, 10608962), (4, 5304481), (7, 3031132), (13, 1632148), (14, 1515566), (26, 816074), (28, 757783), (52, 408037), (71, 298844), (91, 233164), (142, 149422), (182, 116582), (284, 74711), (364, 58291), (497, 42692), (821, 25844), (923, 22988), (994, 21346), (1642, 12922), (1846, 11494), (1988, 10673), (3284, 6461), (3692, 5747)]