16718920

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{139}}^1$

素因数の和:278

約数の個数: 64

約数和(自身を含む): 39513600

約数和(自身を除く): 22794680

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 97, 124, 139, 155, 194, 248, 278, 310, 388, 485, 556, 620, 695, 776, 970, 1112, 1240, 1390, 1940, 2780, 3007, 3880, 4309, 5560, 6014, 8618, 12028, 13483, 15035, 17236, 21545, 24056, 26966, 30070, 34472, 43090, 53932, 60140, 67415, 86180, 107864, 120280, 134830, 172360, 269660, 417973, 539320, 835946, 1671892, 2089865, 3343784, 4179730, 8359460, 16718920]

約数ペア:

[(1, 16718920), (2, 8359460), (4, 4179730), (5, 3343784), (8, 2089865), (10, 1671892), (20, 835946), (31, 539320), (40, 417973), (62, 269660), (97, 172360), (124, 134830), (139, 120280), (155, 107864), (194, 86180), (248, 67415), (278, 60140), (310, 53932), (388, 43090), (485, 34472), (556, 30070), (620, 26966), (695, 24056), (776, 21545), (970, 17236), (1112, 15035), (1240, 13483), (1390, 12028), (1940, 8618), (2780, 6014), (3007, 5560), (3880, 4309)]