20081800

素因数分解:

$2^3\times 5^2\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:167

約数の個数: 96

約数和(自身を含む): 49996800

約数和(自身を除く): 29915000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 31, 40, 41, 50, 62, 79, 82, 100, 124, 155, 158, 164, 200, 205, 248, 310, 316, 328, 395, 410, 620, 632, 775, 790, 820, 1025, 1240, 1271, 1550, 1580, 1640, 1975, 2050, 2449, 2542, 3100, 3160, 3239, 3950, 4100, 4898, 5084, 6200, 6355, 6478, 7900, 8200, 9796, 10168, 12245, 12710, 12956, 15800, 16195, 19592, 24490, 25420, 25912, 31775, 32390, 48980, 50840, 61225, 63550, 64780, 80975, 97960, 100409, 122450, 127100, 129560, 161950, 200818, 244900, 254200, 323900, 401636, 489800, 502045, 647800, 803272, 1004090, 2008180, 2510225, 4016360, 5020450, 10040900, 20081800]

約数ペア:

[(1, 20081800), (2, 10040900), (4, 5020450), (5, 4016360), (8, 2510225), (10, 2008180), (20, 1004090), (25, 803272), (31, 647800), (40, 502045), (41, 489800), (50, 401636), (62, 323900), (79, 254200), (82, 244900), (100, 200818), (124, 161950), (155, 129560), (158, 127100), (164, 122450), (200, 100409), (205, 97960), (248, 80975), (310, 64780), (316, 63550), (328, 61225), (395, 50840), (410, 48980), (620, 32390), (632, 31775), (775, 25912), (790, 25420), (820, 24490), (1025, 19592), (1240, 16195), (1271, 15800), (1550, 12956), (1580, 12710), (1640, 12245), (1975, 10168), (2050, 9796), (2449, 8200), (2542, 7900), (3100, 6478), (3160, 6355), (3239, 6200), (3950, 5084), (4100, 4898)]