19954840

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{97}}^1\times {\mathrm{139}}^1$

素因数の和:284

約数の個数: 64

約数和(自身を含む): 46922400

約数和(自身を除く): 26967560

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 97, 139, 148, 185, 194, 278, 296, 370, 388, 485, 556, 695, 740, 776, 970, 1112, 1390, 1480, 1940, 2780, 3589, 3880, 5143, 5560, 7178, 10286, 13483, 14356, 17945, 20572, 25715, 26966, 28712, 35890, 41144, 51430, 53932, 67415, 71780, 102860, 107864, 134830, 143560, 205720, 269660, 498871, 539320, 997742, 1995484, 2494355, 3990968, 4988710, 9977420, 19954840]

約数ペア:

[(1, 19954840), (2, 9977420), (4, 4988710), (5, 3990968), (8, 2494355), (10, 1995484), (20, 997742), (37, 539320), (40, 498871), (74, 269660), (97, 205720), (139, 143560), (148, 134830), (185, 107864), (194, 102860), (278, 71780), (296, 67415), (370, 53932), (388, 51430), (485, 41144), (556, 35890), (695, 28712), (740, 26966), (776, 25715), (970, 20572), (1112, 17945), (1390, 14356), (1480, 13483), (1940, 10286), (2780, 7178), (3589, 5560), (3880, 5143)]