20804875

素因数分解:

$5^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:125

約数の個数: 64

約数和(自身を含む): 33546240

約数和(自身を除く): 12741365

約数列:

[1, 5, 7, 13, 25, 31, 35, 59, 65, 91, 125, 155, 175, 217, 295, 325, 403, 413, 455, 767, 775, 875, 1085, 1475, 1625, 1829, 2015, 2065, 2275, 2821, 3835, 3875, 5369, 5425, 7375, 9145, 10075, 10325, 11375, 12803, 14105, 19175, 23777, 26845, 27125, 45725, 50375, 51625, 64015, 70525, 95875, 118885, 134225, 166439, 228625, 320075, 352625, 594425, 671125, 832195, 1600375, 2972125, 4160975, 20804875]

約数ペア:

[(1, 20804875), (5, 4160975), (7, 2972125), (13, 1600375), (25, 832195), (31, 671125), (35, 594425), (59, 352625), (65, 320075), (91, 228625), (125, 166439), (155, 134225), (175, 118885), (217, 95875), (295, 70525), (325, 64015), (403, 51625), (413, 50375), (455, 45725), (767, 27125), (775, 26845), (875, 23777), (1085, 19175), (1475, 14105), (1625, 12803), (1829, 11375), (2015, 10325), (2065, 10075), (2275, 9145), (2821, 7375), (3835, 5425), (3875, 5369)]