19981808

素因数分解:

$2^4\times 7^3\times {\mathrm{11}}^1\times {\mathrm{331}}^1$

素因数の和:371

約数の個数: 80

約数和(自身を含む): 49401600

約数和(自身を除く): 29419792

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 44, 49, 56, 77, 88, 98, 112, 154, 176, 196, 308, 331, 343, 392, 539, 616, 662, 686, 784, 1078, 1232, 1324, 1372, 2156, 2317, 2648, 2744, 3641, 3773, 4312, 4634, 5296, 5488, 7282, 7546, 8624, 9268, 14564, 15092, 16219, 18536, 25487, 29128, 30184, 32438, 37072, 50974, 58256, 60368, 64876, 101948, 113533, 129752, 178409, 203896, 227066, 259504, 356818, 407792, 454132, 713636, 908264, 1248863, 1427272, 1816528, 2497726, 2854544, 4995452, 9990904, 19981808]

約数ペア:

[(1, 19981808), (2, 9990904), (4, 4995452), (7, 2854544), (8, 2497726), (11, 1816528), (14, 1427272), (16, 1248863), (22, 908264), (28, 713636), (44, 454132), (49, 407792), (56, 356818), (77, 259504), (88, 227066), (98, 203896), (112, 178409), (154, 129752), (176, 113533), (196, 101948), (308, 64876), (331, 60368), (343, 58256), (392, 50974), (539, 37072), (616, 32438), (662, 30184), (686, 29128), (784, 25487), (1078, 18536), (1232, 16219), (1324, 15092), (1372, 14564), (2156, 9268), (2317, 8624), (2648, 7546), (2744, 7282), (3641, 5488), (3773, 5296), (4312, 4634)]