21257370

素因数分解:

$2^1\times 3^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{601}}^1$

素因数の和:748

約数の個数: 64

約数和(自身を含む): 57214080

約数和(自身を除く): 35956710

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 90, 131, 135, 262, 270, 393, 601, 655, 786, 1179, 1202, 1310, 1803, 1965, 2358, 3005, 3537, 3606, 3930, 5409, 5895, 6010, 7074, 9015, 10818, 11790, 16227, 17685, 18030, 27045, 32454, 35370, 54090, 78731, 81135, 157462, 162270, 236193, 393655, 472386, 708579, 787310, 1180965, 1417158, 2125737, 2361930, 3542895, 4251474, 7085790, 10628685, 21257370]

約数ペア:

[(1, 21257370), (2, 10628685), (3, 7085790), (5, 4251474), (6, 3542895), (9, 2361930), (10, 2125737), (15, 1417158), (18, 1180965), (27, 787310), (30, 708579), (45, 472386), (54, 393655), (90, 236193), (131, 162270), (135, 157462), (262, 81135), (270, 78731), (393, 54090), (601, 35370), (655, 32454), (786, 27045), (1179, 18030), (1202, 17685), (1310, 16227), (1803, 11790), (1965, 10818), (2358, 9015), (3005, 7074), (3537, 6010), (3606, 5895), (3930, 5409)]