28291375

素因数分解:

$5^3\times 7^2\times {\mathrm{31}}^1\times {\mathrm{149}}^1$

素因数の和:209

約数の個数: 48

約数和(自身を含む): 42681600

約数和(自身を除く): 14390225

約数列:

[1, 5, 7, 25, 31, 35, 49, 125, 149, 155, 175, 217, 245, 745, 775, 875, 1043, 1085, 1225, 1519, 3725, 3875, 4619, 5215, 5425, 6125, 7301, 7595, 18625, 23095, 26075, 27125, 32333, 36505, 37975, 115475, 130375, 161665, 182525, 189875, 226331, 577375, 808325, 912625, 1131655, 4041625, 5658275, 28291375]

約数ペア:

[(1, 28291375), (5, 5658275), (7, 4041625), (25, 1131655), (31, 912625), (35, 808325), (49, 577375), (125, 226331), (149, 189875), (155, 182525), (175, 161665), (217, 130375), (245, 115475), (745, 37975), (775, 36505), (875, 32333), (1043, 27125), (1085, 26075), (1225, 23095), (1519, 18625), (3725, 7595), (3875, 7301), (4619, 6125), (5215, 5425)]