19880672

素因数分解:

$2^5\times 7^2\times {\mathrm{31}}^1\times {\mathrm{409}}^1$

素因数の和:464

約数の個数: 72

約数和(自身を含む): 47113920

約数和(自身を除く): 27233248

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 31, 32, 49, 56, 62, 98, 112, 124, 196, 217, 224, 248, 392, 409, 434, 496, 784, 818, 868, 992, 1519, 1568, 1636, 1736, 2863, 3038, 3272, 3472, 5726, 6076, 6544, 6944, 11452, 12152, 12679, 13088, 20041, 22904, 24304, 25358, 40082, 45808, 48608, 50716, 80164, 88753, 91616, 101432, 160328, 177506, 202864, 320656, 355012, 405728, 621271, 641312, 710024, 1242542, 1420048, 2485084, 2840096, 4970168, 9940336, 19880672]

約数ペア:

[(1, 19880672), (2, 9940336), (4, 4970168), (7, 2840096), (8, 2485084), (14, 1420048), (16, 1242542), (28, 710024), (31, 641312), (32, 621271), (49, 405728), (56, 355012), (62, 320656), (98, 202864), (112, 177506), (124, 160328), (196, 101432), (217, 91616), (224, 88753), (248, 80164), (392, 50716), (409, 48608), (434, 45808), (496, 40082), (784, 25358), (818, 24304), (868, 22904), (992, 20041), (1519, 13088), (1568, 12679), (1636, 12152), (1736, 11452), (2863, 6944), (3038, 6544), (3272, 6076), (3472, 5726)]