21878500

素因数分解:

$2^2\times 5^3\times 7^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1$

素因数の和:99

約数の個数: 144

約数和(自身を含む): 59754240

約数和(自身を除く): 37875740

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 25, 28, 35, 38, 47, 49, 50, 70, 76, 94, 95, 98, 100, 125, 133, 140, 175, 188, 190, 196, 235, 245, 250, 266, 329, 350, 380, 470, 475, 490, 500, 532, 658, 665, 700, 875, 893, 931, 940, 950, 980, 1175, 1225, 1316, 1330, 1645, 1750, 1786, 1862, 1900, 2303, 2350, 2375, 2450, 2660, 3290, 3325, 3500, 3572, 3724, 4465, 4606, 4655, 4700, 4750, 4900, 5875, 6125, 6251, 6580, 6650, 8225, 8930, 9212, 9310, 9500, 11515, 11750, 12250, 12502, 13300, 16450, 16625, 17860, 18620, 22325, 23030, 23275, 23500, 24500, 25004, 31255, 32900, 33250, 41125, 43757, 44650, 46060, 46550, 57575, 62510, 66500, 82250, 87514, 89300, 93100, 111625, 115150, 116375, 125020, 156275, 164500, 175028, 218785, 223250, 230300, 232750, 287875, 312550, 437570, 446500, 465500, 575750, 625100, 781375, 875140, 1093925, 1151500, 1562750, 2187850, 3125500, 4375700, 5469625, 10939250, 21878500]

約数ペア:

[(1, 21878500), (2, 10939250), (4, 5469625), (5, 4375700), (7, 3125500), (10, 2187850), (14, 1562750), (19, 1151500), (20, 1093925), (25, 875140), (28, 781375), (35, 625100), (38, 575750), (47, 465500), (49, 446500), (50, 437570), (70, 312550), (76, 287875), (94, 232750), (95, 230300), (98, 223250), (100, 218785), (125, 175028), (133, 164500), (140, 156275), (175, 125020), (188, 116375), (190, 115150), (196, 111625), (235, 93100), (245, 89300), (250, 87514), (266, 82250), (329, 66500), (350, 62510), (380, 57575), (470, 46550), (475, 46060), (490, 44650), (500, 43757), (532, 41125), (658, 33250), (665, 32900), (700, 31255), (875, 25004), (893, 24500), (931, 23500), (940, 23275), (950, 23030), (980, 22325), (1175, 18620), (1225, 17860), (1316, 16625), (1330, 16450), (1645, 13300), (1750, 12502), (1786, 12250), (1862, 11750), (1900, 11515), (2303, 9500), (2350, 9310), (2375, 9212), (2450, 8930), (2660, 8225), (3290, 6650), (3325, 6580), (3500, 6251), (3572, 6125), (3724, 5875), (4465, 4900), (4606, 4750), (4655, 4700)]