20807500

素因数分解:

$2^2\times 5^4\times 7^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1$

素因数の和:101

約数の個数: 120

約数和(自身を含む): 55107360

約数和(自身を除く): 34299860

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 29, 35, 41, 50, 58, 70, 82, 100, 116, 125, 140, 145, 164, 175, 203, 205, 250, 287, 290, 350, 406, 410, 500, 574, 580, 625, 700, 725, 812, 820, 875, 1015, 1025, 1148, 1189, 1250, 1435, 1450, 1750, 2030, 2050, 2378, 2500, 2870, 2900, 3500, 3625, 4060, 4100, 4375, 4756, 5075, 5125, 5740, 5945, 7175, 7250, 8323, 8750, 10150, 10250, 11890, 14350, 14500, 16646, 17500, 18125, 20300, 20500, 23780, 25375, 25625, 28700, 29725, 33292, 35875, 36250, 41615, 50750, 51250, 59450, 71750, 72500, 83230, 101500, 102500, 118900, 126875, 143500, 148625, 166460, 179375, 208075, 253750, 297250, 358750, 416150, 507500, 594500, 717500, 743125, 832300, 1040375, 1486250, 2080750, 2972500, 4161500, 5201875, 10403750, 20807500]

約数ペア:

[(1, 20807500), (2, 10403750), (4, 5201875), (5, 4161500), (7, 2972500), (10, 2080750), (14, 1486250), (20, 1040375), (25, 832300), (28, 743125), (29, 717500), (35, 594500), (41, 507500), (50, 416150), (58, 358750), (70, 297250), (82, 253750), (100, 208075), (116, 179375), (125, 166460), (140, 148625), (145, 143500), (164, 126875), (175, 118900), (203, 102500), (205, 101500), (250, 83230), (287, 72500), (290, 71750), (350, 59450), (406, 51250), (410, 50750), (500, 41615), (574, 36250), (580, 35875), (625, 33292), (700, 29725), (725, 28700), (812, 25625), (820, 25375), (875, 23780), (1015, 20500), (1025, 20300), (1148, 18125), (1189, 17500), (1250, 16646), (1435, 14500), (1450, 14350), (1750, 11890), (2030, 10250), (2050, 10150), (2378, 8750), (2500, 8323), (2870, 7250), (2900, 7175), (3500, 5945), (3625, 5740), (4060, 5125), (4100, 5075), (4375, 4756)]