19958720

素因数分解:

$2^6\times 5^1\times {\mathrm{97}}^1\times {\mathrm{643}}^1$

素因数の和:757

約数の個数: 56

約数和(自身を含む): 48091344

約数和(自身を除く): 28132624

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 97, 160, 194, 320, 388, 485, 643, 776, 970, 1286, 1552, 1940, 2572, 3104, 3215, 3880, 5144, 6208, 6430, 7760, 10288, 12860, 15520, 20576, 25720, 31040, 41152, 51440, 62371, 102880, 124742, 205760, 249484, 311855, 498968, 623710, 997936, 1247420, 1995872, 2494840, 3991744, 4989680, 9979360, 19958720]

約数ペア:

[(1, 19958720), (2, 9979360), (4, 4989680), (5, 3991744), (8, 2494840), (10, 1995872), (16, 1247420), (20, 997936), (32, 623710), (40, 498968), (64, 311855), (80, 249484), (97, 205760), (160, 124742), (194, 102880), (320, 62371), (388, 51440), (485, 41152), (643, 31040), (776, 25720), (970, 20576), (1286, 15520), (1552, 12860), (1940, 10288), (2572, 7760), (3104, 6430), (3215, 6208), (3880, 5144)]