21435880

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{293}}^1$

素因数の和:394

約数の個数: 64

約数和(自身を含む): 50803200

約数和(自身を除く): 29367320

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 59, 62, 118, 124, 155, 236, 248, 293, 295, 310, 472, 586, 590, 620, 1172, 1180, 1240, 1465, 1829, 2344, 2360, 2930, 3658, 5860, 7316, 9083, 9145, 11720, 14632, 17287, 18166, 18290, 34574, 36332, 36580, 45415, 69148, 72664, 73160, 86435, 90830, 138296, 172870, 181660, 345740, 363320, 535897, 691480, 1071794, 2143588, 2679485, 4287176, 5358970, 10717940, 21435880]

約数ペア:

[(1, 21435880), (2, 10717940), (4, 5358970), (5, 4287176), (8, 2679485), (10, 2143588), (20, 1071794), (31, 691480), (40, 535897), (59, 363320), (62, 345740), (118, 181660), (124, 172870), (155, 138296), (236, 90830), (248, 86435), (293, 73160), (295, 72664), (310, 69148), (472, 45415), (586, 36580), (590, 36332), (620, 34574), (1172, 18290), (1180, 18166), (1240, 17287), (1465, 14632), (1829, 11720), (2344, 9145), (2360, 9083), (2930, 7316), (3658, 5860)]