19727320

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{257}}^1$

素因数の和:388

約数の個数: 64

約数和(自身を含む): 47368800

約数和(自身を除く): 27641480

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 101, 152, 190, 202, 257, 380, 404, 505, 514, 760, 808, 1010, 1028, 1285, 1919, 2020, 2056, 2570, 3838, 4040, 4883, 5140, 7676, 9595, 9766, 10280, 15352, 19190, 19532, 24415, 25957, 38380, 39064, 48830, 51914, 76760, 97660, 103828, 129785, 195320, 207656, 259570, 493183, 519140, 986366, 1038280, 1972732, 2465915, 3945464, 4931830, 9863660, 19727320]

約数ペア:

[(1, 19727320), (2, 9863660), (4, 4931830), (5, 3945464), (8, 2465915), (10, 1972732), (19, 1038280), (20, 986366), (38, 519140), (40, 493183), (76, 259570), (95, 207656), (101, 195320), (152, 129785), (190, 103828), (202, 97660), (257, 76760), (380, 51914), (404, 48830), (505, 39064), (514, 38380), (760, 25957), (808, 24415), (1010, 19532), (1028, 19190), (1285, 15352), (1919, 10280), (2020, 9766), (2056, 9595), (2570, 7676), (3838, 5140), (4040, 4883)]