21200900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{977}}^1$

素因数の和:1029

約数の個数: 72

約数和(自身を含む): 54329856

約数和(自身を除く): 33128956

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 31, 35, 50, 62, 70, 100, 124, 140, 155, 175, 217, 310, 350, 434, 620, 700, 775, 868, 977, 1085, 1550, 1954, 2170, 3100, 3908, 4340, 4885, 5425, 6839, 9770, 10850, 13678, 19540, 21700, 24425, 27356, 30287, 34195, 48850, 60574, 68390, 97700, 121148, 136780, 151435, 170975, 212009, 302870, 341950, 424018, 605740, 683900, 757175, 848036, 1060045, 1514350, 2120090, 3028700, 4240180, 5300225, 10600450, 21200900]

約数ペア:

[(1, 21200900), (2, 10600450), (4, 5300225), (5, 4240180), (7, 3028700), (10, 2120090), (14, 1514350), (20, 1060045), (25, 848036), (28, 757175), (31, 683900), (35, 605740), (50, 424018), (62, 341950), (70, 302870), (100, 212009), (124, 170975), (140, 151435), (155, 136780), (175, 121148), (217, 97700), (310, 68390), (350, 60574), (434, 48850), (620, 34195), (700, 30287), (775, 27356), (868, 24425), (977, 21700), (1085, 19540), (1550, 13678), (1954, 10850), (2170, 9770), (3100, 6839), (3908, 5425), (4340, 4885)]