81239375

素因数分解:

$5^4\times 7^1\times {\mathrm{31}}^1\times {\mathrm{599}}^1$

素因数の和:657

約数の個数: 40

約数和(自身を含む): 119961600

約数和(自身を除く): 38722225

約数列:

[1, 5, 7, 25, 31, 35, 125, 155, 175, 217, 599, 625, 775, 875, 1085, 2995, 3875, 4193, 4375, 5425, 14975, 18569, 19375, 20965, 27125, 74875, 92845, 104825, 129983, 135625, 374375, 464225, 524125, 649915, 2321125, 2620625, 3249575, 11605625, 16247875, 81239375]

約数ペア:

[(1, 81239375), (5, 16247875), (7, 11605625), (25, 3249575), (31, 2620625), (35, 2321125), (125, 649915), (155, 524125), (175, 464225), (217, 374375), (599, 135625), (625, 129983), (775, 104825), (875, 92845), (1085, 74875), (2995, 27125), (3875, 20965), (4193, 19375), (4375, 18569), (5425, 14975)]