21938840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{419}}^1$

素因数の和:465

約数の個数: 128

約数和(自身を含む): 65318400

約数和(自身を除く): 43379560

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 17, 20, 22, 28, 34, 35, 40, 44, 55, 56, 68, 70, 77, 85, 88, 110, 119, 136, 140, 154, 170, 187, 220, 238, 280, 308, 340, 374, 385, 419, 440, 476, 595, 616, 680, 748, 770, 838, 935, 952, 1190, 1309, 1496, 1540, 1676, 1870, 2095, 2380, 2618, 2933, 3080, 3352, 3740, 4190, 4609, 4760, 5236, 5866, 6545, 7123, 7480, 8380, 9218, 10472, 11732, 13090, 14246, 14665, 16760, 18436, 23045, 23464, 26180, 28492, 29330, 32263, 35615, 36872, 46090, 49861, 52360, 56984, 58660, 64526, 71230, 78353, 92180, 99722, 117320, 129052, 142460, 156706, 161315, 184360, 199444, 249305, 258104, 284920, 313412, 322630, 391765, 398888, 498610, 548471, 626824, 645260, 783530, 997220, 1096942, 1290520, 1567060, 1994440, 2193884, 2742355, 3134120, 4387768, 5484710, 10969420, 21938840]

約数ペア:

[(1, 21938840), (2, 10969420), (4, 5484710), (5, 4387768), (7, 3134120), (8, 2742355), (10, 2193884), (11, 1994440), (14, 1567060), (17, 1290520), (20, 1096942), (22, 997220), (28, 783530), (34, 645260), (35, 626824), (40, 548471), (44, 498610), (55, 398888), (56, 391765), (68, 322630), (70, 313412), (77, 284920), (85, 258104), (88, 249305), (110, 199444), (119, 184360), (136, 161315), (140, 156706), (154, 142460), (170, 129052), (187, 117320), (220, 99722), (238, 92180), (280, 78353), (308, 71230), (340, 64526), (374, 58660), (385, 56984), (419, 52360), (440, 49861), (476, 46090), (595, 36872), (616, 35615), (680, 32263), (748, 29330), (770, 28492), (838, 26180), (935, 23464), (952, 23045), (1190, 18436), (1309, 16760), (1496, 14665), (1540, 14246), (1676, 13090), (1870, 11732), (2095, 10472), (2380, 9218), (2618, 8380), (2933, 7480), (3080, 7123), (3352, 6545), (3740, 5866), (4190, 5236), (4609, 4760)]