21259480

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2543}}^1$

素因数の和:2584

約数の個数: 64

約数和(自身を含む): 54950400

約数和(自身を除く): 33690920

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 38, 40, 44, 55, 76, 88, 95, 110, 152, 190, 209, 220, 380, 418, 440, 760, 836, 1045, 1672, 2090, 2543, 4180, 5086, 8360, 10172, 12715, 20344, 25430, 27973, 48317, 50860, 55946, 96634, 101720, 111892, 139865, 193268, 223784, 241585, 279730, 386536, 483170, 531487, 559460, 966340, 1062974, 1118920, 1932680, 2125948, 2657435, 4251896, 5314870, 10629740, 21259480]

約数ペア:

[(1, 21259480), (2, 10629740), (4, 5314870), (5, 4251896), (8, 2657435), (10, 2125948), (11, 1932680), (19, 1118920), (20, 1062974), (22, 966340), (38, 559460), (40, 531487), (44, 483170), (55, 386536), (76, 279730), (88, 241585), (95, 223784), (110, 193268), (152, 139865), (190, 111892), (209, 101720), (220, 96634), (380, 55946), (418, 50860), (440, 48317), (760, 27973), (836, 25430), (1045, 20344), (1672, 12715), (2090, 10172), (2543, 8360), (4180, 5086)]