21420476

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{4091}}^1$

素因数の和:4130

約数の個数: 48

約数和(自身を含む): 49496832

約数和(自身を除く): 28076356

約数列:

[1, 2, 4, 7, 11, 14, 17, 22, 28, 34, 44, 68, 77, 119, 154, 187, 238, 308, 374, 476, 748, 1309, 2618, 4091, 5236, 8182, 16364, 28637, 45001, 57274, 69547, 90002, 114548, 139094, 180004, 278188, 315007, 486829, 630014, 765017, 973658, 1260028, 1530034, 1947316, 3060068, 5355119, 10710238, 21420476]

約数ペア:

[(1, 21420476), (2, 10710238), (4, 5355119), (7, 3060068), (11, 1947316), (14, 1530034), (17, 1260028), (22, 973658), (28, 765017), (34, 630014), (44, 486829), (68, 315007), (77, 278188), (119, 180004), (154, 139094), (187, 114548), (238, 90002), (308, 69547), (374, 57274), (476, 45001), (748, 28637), (1309, 16364), (2618, 8182), (4091, 5236)]