20990375

素因数分解:

$5^3\times 7^2\times {\mathrm{23}}^1\times {\mathrm{149}}^1$

素因数の和:201

約数の個数: 48

約数和(自身を含む): 32011200

約数和(自身を除く): 11020825

約数列:

[1, 5, 7, 23, 25, 35, 49, 115, 125, 149, 161, 175, 245, 575, 745, 805, 875, 1043, 1127, 1225, 2875, 3427, 3725, 4025, 5215, 5635, 6125, 7301, 17135, 18625, 20125, 23989, 26075, 28175, 36505, 85675, 119945, 130375, 140875, 167923, 182525, 428375, 599725, 839615, 912625, 2998625, 4198075, 20990375]

約数ペア:

[(1, 20990375), (5, 4198075), (7, 2998625), (23, 912625), (25, 839615), (35, 599725), (49, 428375), (115, 182525), (125, 167923), (149, 140875), (161, 130375), (175, 119945), (245, 85675), (575, 36505), (745, 28175), (805, 26075), (875, 23989), (1043, 20125), (1127, 18625), (1225, 17135), (2875, 7301), (3427, 6125), (3725, 5635), (4025, 5215)]