19812905

素因数分解:

$5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:174

約数の個数: 48

約数和(自身を含む): 30139776

約数和(自身を除く): 10326871

約数列:

[1, 5, 7, 17, 35, 49, 67, 71, 85, 119, 245, 335, 355, 469, 497, 595, 833, 1139, 1207, 2345, 2485, 3283, 3479, 4165, 4757, 5695, 6035, 7973, 8449, 16415, 17395, 23785, 33299, 39865, 42245, 55811, 59143, 80869, 166495, 233093, 279055, 295715, 404345, 566083, 1165465, 2830415, 3962581, 19812905]

約数ペア:

[(1, 19812905), (5, 3962581), (7, 2830415), (17, 1165465), (35, 566083), (49, 404345), (67, 295715), (71, 279055), (85, 233093), (119, 166495), (245, 80869), (335, 59143), (355, 55811), (469, 42245), (497, 39865), (595, 33299), (833, 23785), (1139, 17395), (1207, 16415), (2345, 8449), (2485, 7973), (3283, 6035), (3479, 5695), (4165, 4757)]