21208460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{271}}^1$

素因数の和:343

約数の個数: 96

約数和(自身を含む): 56297472

約数和(自身を除く): 35089012

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 43, 52, 65, 70, 86, 91, 130, 140, 172, 182, 215, 260, 271, 301, 364, 430, 455, 542, 559, 602, 860, 910, 1084, 1118, 1204, 1355, 1505, 1820, 1897, 2236, 2710, 2795, 3010, 3523, 3794, 3913, 5420, 5590, 6020, 7046, 7588, 7826, 9485, 11180, 11653, 14092, 15652, 17615, 18970, 19565, 23306, 24661, 35230, 37940, 39130, 46612, 49322, 58265, 70460, 78260, 81571, 98644, 116530, 123305, 151489, 163142, 233060, 246610, 302978, 326284, 407855, 493220, 605956, 757445, 815710, 1060423, 1514890, 1631420, 2120846, 3029780, 4241692, 5302115, 10604230, 21208460]

約数ペア:

[(1, 21208460), (2, 10604230), (4, 5302115), (5, 4241692), (7, 3029780), (10, 2120846), (13, 1631420), (14, 1514890), (20, 1060423), (26, 815710), (28, 757445), (35, 605956), (43, 493220), (52, 407855), (65, 326284), (70, 302978), (86, 246610), (91, 233060), (130, 163142), (140, 151489), (172, 123305), (182, 116530), (215, 98644), (260, 81571), (271, 78260), (301, 70460), (364, 58265), (430, 49322), (455, 46612), (542, 39130), (559, 37940), (602, 35230), (860, 24661), (910, 23306), (1084, 19565), (1118, 18970), (1204, 17615), (1355, 15652), (1505, 14092), (1820, 11653), (1897, 11180), (2236, 9485), (2710, 7826), (2795, 7588), (3010, 7046), (3523, 6020), (3794, 5590), (3913, 5420)]