19511440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{257}}^1$

素因数の和:356

約数の個数: 80

約数和(自身を含む): 49715568

約数和(自身を除く): 30204128

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 73, 80, 104, 130, 146, 208, 257, 260, 292, 365, 514, 520, 584, 730, 949, 1028, 1040, 1168, 1285, 1460, 1898, 2056, 2570, 2920, 3341, 3796, 4112, 4745, 5140, 5840, 6682, 7592, 9490, 10280, 13364, 15184, 16705, 18761, 18980, 20560, 26728, 33410, 37522, 37960, 53456, 66820, 75044, 75920, 93805, 133640, 150088, 187610, 243893, 267280, 300176, 375220, 487786, 750440, 975572, 1219465, 1500880, 1951144, 2438930, 3902288, 4877860, 9755720, 19511440]

約数ペア:

[(1, 19511440), (2, 9755720), (4, 4877860), (5, 3902288), (8, 2438930), (10, 1951144), (13, 1500880), (16, 1219465), (20, 975572), (26, 750440), (40, 487786), (52, 375220), (65, 300176), (73, 267280), (80, 243893), (104, 187610), (130, 150088), (146, 133640), (208, 93805), (257, 75920), (260, 75044), (292, 66820), (365, 53456), (514, 37960), (520, 37522), (584, 33410), (730, 26728), (949, 20560), (1028, 18980), (1040, 18761), (1168, 16705), (1285, 15184), (1460, 13364), (1898, 10280), (2056, 9490), (2570, 7592), (2920, 6682), (3341, 5840), (3796, 5140), (4112, 4745)]