28458220

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{409}}^1$

素因数の和:503

約数の個数: 72

約数和(自身を含む): 70670880

約数和(自身を除く): 42212660

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 71, 98, 140, 142, 196, 245, 284, 355, 409, 490, 497, 710, 818, 980, 994, 1420, 1636, 1988, 2045, 2485, 2863, 3479, 4090, 4970, 5726, 6958, 8180, 9940, 11452, 13916, 14315, 17395, 20041, 28630, 29039, 34790, 40082, 57260, 58078, 69580, 80164, 100205, 116156, 145195, 200410, 203273, 290390, 400820, 406546, 580780, 813092, 1016365, 1422911, 2032730, 2845822, 4065460, 5691644, 7114555, 14229110, 28458220]

約数ペア:

[(1, 28458220), (2, 14229110), (4, 7114555), (5, 5691644), (7, 4065460), (10, 2845822), (14, 2032730), (20, 1422911), (28, 1016365), (35, 813092), (49, 580780), (70, 406546), (71, 400820), (98, 290390), (140, 203273), (142, 200410), (196, 145195), (245, 116156), (284, 100205), (355, 80164), (409, 69580), (490, 58078), (497, 57260), (710, 40082), (818, 34790), (980, 29039), (994, 28630), (1420, 20041), (1636, 17395), (1988, 14315), (2045, 13916), (2485, 11452), (2863, 9940), (3479, 8180), (4090, 6958), (4970, 5726)]