28402556

素因数分解:

$2^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:259

約数の個数: 72

約数和(自身を含む): 63546336

約数和(自身を除く): 35143780

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 49, 52, 71, 91, 98, 142, 157, 182, 196, 284, 314, 364, 497, 628, 637, 923, 994, 1099, 1274, 1846, 1988, 2041, 2198, 2548, 3479, 3692, 4082, 4396, 6461, 6958, 7693, 8164, 11147, 12922, 13916, 14287, 15386, 22294, 25844, 28574, 30772, 44588, 45227, 57148, 78029, 90454, 100009, 144911, 156058, 180908, 200018, 289822, 312116, 400036, 546203, 579644, 1014377, 1092406, 2028754, 2184812, 4057508, 7100639, 14201278, 28402556]

約数ペア:

[(1, 28402556), (2, 14201278), (4, 7100639), (7, 4057508), (13, 2184812), (14, 2028754), (26, 1092406), (28, 1014377), (49, 579644), (52, 546203), (71, 400036), (91, 312116), (98, 289822), (142, 200018), (157, 180908), (182, 156058), (196, 144911), (284, 100009), (314, 90454), (364, 78029), (497, 57148), (628, 45227), (637, 44588), (923, 30772), (994, 28574), (1099, 25844), (1274, 22294), (1846, 15386), (1988, 14287), (2041, 13916), (2198, 12922), (2548, 11147), (3479, 8164), (3692, 7693), (4082, 6958), (4396, 6461)]