20405742

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1$

素因数の和:257

約数の個数: 64

約数和(自身を含む): 48522240

約数和(自身を除く): 28116498

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 53, 89, 103, 106, 159, 178, 206, 267, 309, 318, 371, 534, 618, 623, 721, 742, 1113, 1246, 1442, 1869, 2163, 2226, 3738, 4326, 4717, 5459, 9167, 9434, 10918, 14151, 16377, 18334, 27501, 28302, 32754, 33019, 38213, 55002, 64169, 66038, 76426, 99057, 114639, 128338, 192507, 198114, 229278, 385014, 485851, 971702, 1457553, 2915106, 3400957, 6801914, 10202871, 20405742]

約数ペア:

[(1, 20405742), (2, 10202871), (3, 6801914), (6, 3400957), (7, 2915106), (14, 1457553), (21, 971702), (42, 485851), (53, 385014), (89, 229278), (103, 198114), (106, 192507), (159, 128338), (178, 114639), (206, 99057), (267, 76426), (309, 66038), (318, 64169), (371, 55002), (534, 38213), (618, 33019), (623, 32754), (721, 28302), (742, 27501), (1113, 18334), (1246, 16377), (1442, 14151), (1869, 10918), (2163, 9434), (2226, 9167), (3738, 5459), (4326, 4717)]