20199764380

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{311821}}^1$

素因数の和:311950

約数の個数: 48

約数和(自身を含む): 44004320640

約数和(自身を除く): 23804556260

約数列:

[1, 2, 4, 5, 10, 20, 41, 79, 82, 158, 164, 205, 316, 395, 410, 790, 820, 1580, 3239, 6478, 12956, 16195, 32390, 64780, 311821, 623642, 1247284, 1559105, 3118210, 6236420, 12784661, 24633859, 25569322, 49267718, 51138644, 63923305, 98535436, 123169295, 127846610, 246338590, 255693220, 492677180, 1009988219, 2019976438, 4039952876, 5049941095, 10099882190, 20199764380]

約数ペア:

[(1, 20199764380), (2, 10099882190), (4, 5049941095), (5, 4039952876), (10, 2019976438), (20, 1009988219), (41, 492677180), (79, 255693220), (82, 246338590), (158, 127846610), (164, 123169295), (205, 98535436), (316, 63923305), (395, 51138644), (410, 49267718), (790, 25569322), (820, 24633859), (1580, 12784661), (3239, 6236420), (6478, 3118210), (12956, 1559105), (16195, 1247284), (32390, 623642), (64780, 311821)]