21000391720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{401077}}^1$

素因数の和:401123

約数の個数: 128

約数和(自身を含む): 62375650560

約数和(自身を除く): 41375258840

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, 440, 476, 595, 616, 680, 748, 770, 935, 952, 1190, 1309, 1496, 1540, 1870, 2380, 2618, 3080, 3740, 4760, 5236, 6545, 7480, 10472, 13090, 26180, 52360, 401077, 802154, 1604308, 2005385, 2807539, 3208616, 4010770, 4411847, 5615078, 6818309, 8021540, 8823694, 11230156, 13636618, 14037695, 16043080, 17647388, 22059235, 22460312, 27273236, 28075390, 30882929, 34091545, 35294776, 44118470, 47728163, 54546472, 56150780, 61765858, 68183090, 75001399, 88236940, 95456326, 112301560, 123531716, 136366180, 150002798, 154414645, 176473880, 190912652, 238640815, 247063432, 272732360, 300005596, 308829290, 375006995, 381825304, 477281630, 525009793, 600011192, 617658580, 750013990, 954563260, 1050019586, 1235317160, 1500027980, 1909126520, 2100039172, 2625048965, 3000055960, 4200078344, 5250097930, 10500195860, 21000391720]

約数ペア:

[(1, 21000391720), (2, 10500195860), (4, 5250097930), (5, 4200078344), (7, 3000055960), (8, 2625048965), (10, 2100039172), (11, 1909126520), (14, 1500027980), (17, 1235317160), (20, 1050019586), (22, 954563260), (28, 750013990), (34, 617658580), (35, 600011192), (40, 525009793), (44, 477281630), (55, 381825304), (56, 375006995), (68, 308829290), (70, 300005596), (77, 272732360), (85, 247063432), (88, 238640815), (110, 190912652), (119, 176473880), (136, 154414645), (140, 150002798), (154, 136366180), (170, 123531716), (187, 112301560), (220, 95456326), (238, 88236940), (280, 75001399), (308, 68183090), (340, 61765858), (374, 56150780), (385, 54546472), (440, 47728163), (476, 44118470), (595, 35294776), (616, 34091545), (680, 30882929), (748, 28075390), (770, 27273236), (935, 22460312), (952, 22059235), (1190, 17647388), (1309, 16043080), (1496, 14037695), (1540, 13636618), (1870, 11230156), (2380, 8823694), (2618, 8021540), (3080, 6818309), (3740, 5615078), (4760, 4411847), (5236, 4010770), (6545, 3208616), (7480, 2807539), (10472, 2005385), (13090, 1604308), (26180, 802154), (52360, 401077)]