21090140

素因数分解:

$2^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{293}}^1$

素因数の和:422

約数の個数: 48

約数和(自身を含む): 45934560

約数和(自身を除く): 24844420

約数列:

[1, 2, 4, 5, 10, 20, 59, 61, 118, 122, 236, 244, 293, 295, 305, 586, 590, 610, 1172, 1180, 1220, 1465, 2930, 3599, 5860, 7198, 14396, 17287, 17873, 17995, 34574, 35746, 35990, 69148, 71492, 71980, 86435, 89365, 172870, 178730, 345740, 357460, 1054507, 2109014, 4218028, 5272535, 10545070, 21090140]

約数ペア:

[(1, 21090140), (2, 10545070), (4, 5272535), (5, 4218028), (10, 2109014), (20, 1054507), (59, 357460), (61, 345740), (118, 178730), (122, 172870), (236, 89365), (244, 86435), (293, 71980), (295, 71492), (305, 69148), (586, 35990), (590, 35746), (610, 34574), (1172, 17995), (1180, 17873), (1220, 17287), (1465, 14396), (2930, 7198), (3599, 5860)]