21906780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1213}}^1$

素因数の和:1275

約数の個数: 96

約数和(自身を含む): 71791104

約数和(自身を除く): 49884324

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 43, 60, 70, 84, 86, 105, 129, 140, 172, 210, 215, 258, 301, 420, 430, 516, 602, 645, 860, 903, 1204, 1213, 1290, 1505, 1806, 2426, 2580, 3010, 3612, 3639, 4515, 4852, 6020, 6065, 7278, 8491, 9030, 12130, 14556, 16982, 18060, 18195, 24260, 25473, 33964, 36390, 42455, 50946, 52159, 72780, 84910, 101892, 104318, 127365, 156477, 169820, 208636, 254730, 260795, 312954, 365113, 509460, 521590, 625908, 730226, 782385, 1043180, 1095339, 1460452, 1564770, 1825565, 2190678, 3129540, 3651130, 4381356, 5476695, 7302260, 10953390, 21906780]

約数ペア:

[(1, 21906780), (2, 10953390), (3, 7302260), (4, 5476695), (5, 4381356), (6, 3651130), (7, 3129540), (10, 2190678), (12, 1825565), (14, 1564770), (15, 1460452), (20, 1095339), (21, 1043180), (28, 782385), (30, 730226), (35, 625908), (42, 521590), (43, 509460), (60, 365113), (70, 312954), (84, 260795), (86, 254730), (105, 208636), (129, 169820), (140, 156477), (172, 127365), (210, 104318), (215, 101892), (258, 84910), (301, 72780), (420, 52159), (430, 50946), (516, 42455), (602, 36390), (645, 33964), (860, 25473), (903, 24260), (1204, 18195), (1213, 18060), (1290, 16982), (1505, 14556), (1806, 12130), (2426, 9030), (2580, 8491), (3010, 7278), (3612, 6065), (3639, 6020), (4515, 4852)]