20512782388

素因数分解:

$2^2\times 7^2\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{39839}}^1$

素因数の和:39965

約数の個数: 72

約数和(自身を含む): 43491893760

約数和(自身を除く): 22979111372

約数列:

[1, 2, 4, 7, 14, 28, 37, 49, 71, 74, 98, 142, 148, 196, 259, 284, 497, 518, 994, 1036, 1813, 1988, 2627, 3479, 3626, 5254, 6958, 7252, 10508, 13916, 18389, 36778, 39839, 73556, 79678, 128723, 159356, 257446, 278873, 514892, 557746, 1115492, 1474043, 1952111, 2828569, 2948086, 3904222, 5657138, 5896172, 7808444, 10318301, 11314276, 19799983, 20636602, 39599966, 41273204, 72228107, 79199932, 104657053, 138599881, 144456214, 209314106, 277199762, 288912428, 418628212, 554399524, 732599371, 1465198742, 2930397484, 5128195597, 10256391194, 20512782388]

約数ペア:

[(1, 20512782388), (2, 10256391194), (4, 5128195597), (7, 2930397484), (14, 1465198742), (28, 732599371), (37, 554399524), (49, 418628212), (71, 288912428), (74, 277199762), (98, 209314106), (142, 144456214), (148, 138599881), (196, 104657053), (259, 79199932), (284, 72228107), (497, 41273204), (518, 39599966), (994, 20636602), (1036, 19799983), (1813, 11314276), (1988, 10318301), (2627, 7808444), (3479, 5896172), (3626, 5657138), (5254, 3904222), (6958, 2948086), (7252, 2828569), (10508, 1952111), (13916, 1474043), (18389, 1115492), (36778, 557746), (39839, 514892), (73556, 278873), (79678, 257446), (128723, 159356)]