21485480

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{17327}}^1$

素因数の和:17369

約数の個数: 32

約数和(自身を含む): 49904640

約数和(自身を除く): 28419160

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 17327, 34654, 69308, 86635, 138616, 173270, 346540, 537137, 693080, 1074274, 2148548, 2685685, 4297096, 5371370, 10742740, 21485480]

約数ペア:

[(1, 21485480), (2, 10742740), (4, 5371370), (5, 4297096), (8, 2685685), (10, 2148548), (20, 1074274), (31, 693080), (40, 537137), (62, 346540), (124, 173270), (155, 138616), (248, 86635), (310, 69308), (620, 34654), (1240, 17327)]