21915740

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1$

素因数の和:160

約数の個数: 144

約数和(自身を含む): 62052480

約数和(自身を除く): 40136740

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 19, 20, 22, 28, 35, 38, 44, 49, 55, 70, 76, 77, 95, 98, 107, 110, 133, 140, 154, 190, 196, 209, 214, 220, 245, 266, 308, 380, 385, 418, 428, 490, 532, 535, 539, 665, 749, 770, 836, 931, 980, 1045, 1070, 1078, 1177, 1330, 1463, 1498, 1540, 1862, 2033, 2090, 2140, 2156, 2354, 2660, 2695, 2926, 2996, 3724, 3745, 4066, 4180, 4655, 4708, 5243, 5390, 5852, 5885, 7315, 7490, 8132, 8239, 9310, 10165, 10241, 10486, 10780, 11770, 14231, 14630, 14980, 16478, 18620, 20330, 20482, 20972, 22363, 23540, 26215, 28462, 29260, 32956, 40660, 40964, 41195, 44726, 51205, 52430, 56924, 57673, 71155, 82390, 89452, 99617, 102410, 104860, 111815, 115346, 142310, 156541, 164780, 199234, 204820, 223630, 230692, 284620, 288365, 313082, 398468, 447260, 498085, 576730, 626164, 782705, 996170, 1095787, 1153460, 1565410, 1992340, 2191574, 3130820, 4383148, 5478935, 10957870, 21915740]

約数ペア:

[(1, 21915740), (2, 10957870), (4, 5478935), (5, 4383148), (7, 3130820), (10, 2191574), (11, 1992340), (14, 1565410), (19, 1153460), (20, 1095787), (22, 996170), (28, 782705), (35, 626164), (38, 576730), (44, 498085), (49, 447260), (55, 398468), (70, 313082), (76, 288365), (77, 284620), (95, 230692), (98, 223630), (107, 204820), (110, 199234), (133, 164780), (140, 156541), (154, 142310), (190, 115346), (196, 111815), (209, 104860), (214, 102410), (220, 99617), (245, 89452), (266, 82390), (308, 71155), (380, 57673), (385, 56924), (418, 52430), (428, 51205), (490, 44726), (532, 41195), (535, 40964), (539, 40660), (665, 32956), (749, 29260), (770, 28462), (836, 26215), (931, 23540), (980, 22363), (1045, 20972), (1070, 20482), (1078, 20330), (1177, 18620), (1330, 16478), (1463, 14980), (1498, 14630), (1540, 14231), (1862, 11770), (2033, 10780), (2090, 10486), (2140, 10241), (2156, 10165), (2354, 9310), (2660, 8239), (2695, 8132), (2926, 7490), (2996, 7315), (3724, 5885), (3745, 5852), (4066, 5390), (4180, 5243), (4655, 4708)]