21296380

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{701}}^1$

素因数の和:755

約数の個数: 72

約数和(自身を含む): 53778816

約数和(自身を除く): 32482436

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 49, 62, 70, 98, 124, 140, 155, 196, 217, 245, 310, 434, 490, 620, 701, 868, 980, 1085, 1402, 1519, 2170, 2804, 3038, 3505, 4340, 4907, 6076, 7010, 7595, 9814, 14020, 15190, 19628, 21731, 24535, 30380, 34349, 43462, 49070, 68698, 86924, 98140, 108655, 137396, 152117, 171745, 217310, 304234, 343490, 434620, 608468, 686980, 760585, 1064819, 1521170, 2129638, 3042340, 4259276, 5324095, 10648190, 21296380]

約数ペア:

[(1, 21296380), (2, 10648190), (4, 5324095), (5, 4259276), (7, 3042340), (10, 2129638), (14, 1521170), (20, 1064819), (28, 760585), (31, 686980), (35, 608468), (49, 434620), (62, 343490), (70, 304234), (98, 217310), (124, 171745), (140, 152117), (155, 137396), (196, 108655), (217, 98140), (245, 86924), (310, 68698), (434, 49070), (490, 43462), (620, 34349), (701, 30380), (868, 24535), (980, 21731), (1085, 19628), (1402, 15190), (1519, 14020), (2170, 9814), (2804, 7595), (3038, 7010), (3505, 6076), (4340, 4907)]