20563700

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1$

素因数の和:249

約数の個数: 72

約数和(自身を含む): 47913600

約数和(自身を除く): 27349900

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 79, 95, 100, 137, 158, 190, 274, 316, 380, 395, 475, 548, 685, 790, 950, 1370, 1501, 1580, 1900, 1975, 2603, 2740, 3002, 3425, 3950, 5206, 6004, 6850, 7505, 7900, 10412, 10823, 13015, 13700, 15010, 21646, 26030, 30020, 37525, 43292, 52060, 54115, 65075, 75050, 108230, 130150, 150100, 205637, 216460, 260300, 270575, 411274, 541150, 822548, 1028185, 1082300, 2056370, 4112740, 5140925, 10281850, 20563700]

約数ペア:

[(1, 20563700), (2, 10281850), (4, 5140925), (5, 4112740), (10, 2056370), (19, 1082300), (20, 1028185), (25, 822548), (38, 541150), (50, 411274), (76, 270575), (79, 260300), (95, 216460), (100, 205637), (137, 150100), (158, 130150), (190, 108230), (274, 75050), (316, 65075), (380, 54115), (395, 52060), (475, 43292), (548, 37525), (685, 30020), (790, 26030), (950, 21646), (1370, 15010), (1501, 13700), (1580, 13015), (1900, 10823), (1975, 10412), (2603, 7900), (2740, 7505), (3002, 6850), (3425, 6004), (3950, 5206)]