20475728

素因数分解:

$2^4\times 7^4\times {\mathrm{13}}^1\times {\mathrm{41}}^1$

素因数の和:90

約数の個数: 100

約数和(自身を含む): 51056628

約数和(自身を除く): 30580900

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 41, 49, 52, 56, 82, 91, 98, 104, 112, 164, 182, 196, 208, 287, 328, 343, 364, 392, 533, 574, 637, 656, 686, 728, 784, 1066, 1148, 1274, 1372, 1456, 2009, 2132, 2296, 2401, 2548, 2744, 3731, 4018, 4264, 4459, 4592, 4802, 5096, 5488, 7462, 8036, 8528, 8918, 9604, 10192, 14063, 14924, 16072, 17836, 19208, 26117, 28126, 29848, 31213, 32144, 35672, 38416, 52234, 56252, 59696, 62426, 71344, 98441, 104468, 112504, 124852, 182819, 196882, 208936, 225008, 249704, 365638, 393764, 417872, 499408, 731276, 787528, 1279733, 1462552, 1575056, 2559466, 2925104, 5118932, 10237864, 20475728]

約数ペア:

[(1, 20475728), (2, 10237864), (4, 5118932), (7, 2925104), (8, 2559466), (13, 1575056), (14, 1462552), (16, 1279733), (26, 787528), (28, 731276), (41, 499408), (49, 417872), (52, 393764), (56, 365638), (82, 249704), (91, 225008), (98, 208936), (104, 196882), (112, 182819), (164, 124852), (182, 112504), (196, 104468), (208, 98441), (287, 71344), (328, 62426), (343, 59696), (364, 56252), (392, 52234), (533, 38416), (574, 35672), (637, 32144), (656, 31213), (686, 29848), (728, 28126), (784, 26117), (1066, 19208), (1148, 17836), (1274, 16072), (1372, 14924), (1456, 14063), (2009, 10192), (2132, 9604), (2296, 8918), (2401, 8528), (2548, 8036), (2744, 7462), (3731, 5488), (4018, 5096), (4264, 4802), (4459, 4592)]