21782740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{431}}^1$

素因数の和:485

約数の個数: 72

約数和(自身を含む): 55302912

約数和(自身を除く): 33520172

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 361, 380, 431, 532, 665, 722, 862, 1330, 1444, 1724, 1805, 2155, 2527, 2660, 3017, 3610, 4310, 5054, 6034, 7220, 8189, 8620, 10108, 12068, 12635, 15085, 16378, 25270, 30170, 32756, 40945, 50540, 57323, 60340, 81890, 114646, 155591, 163780, 229292, 286615, 311182, 573230, 622364, 777955, 1089137, 1146460, 1555910, 2178274, 3111820, 4356548, 5445685, 10891370, 21782740]

約数ペア:

[(1, 21782740), (2, 10891370), (4, 5445685), (5, 4356548), (7, 3111820), (10, 2178274), (14, 1555910), (19, 1146460), (20, 1089137), (28, 777955), (35, 622364), (38, 573230), (70, 311182), (76, 286615), (95, 229292), (133, 163780), (140, 155591), (190, 114646), (266, 81890), (361, 60340), (380, 57323), (431, 50540), (532, 40945), (665, 32756), (722, 30170), (862, 25270), (1330, 16378), (1444, 15085), (1724, 12635), (1805, 12068), (2155, 10108), (2527, 8620), (2660, 8189), (3017, 7220), (3610, 6034), (4310, 5054)]