19654520

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1\times {\mathrm{127}}^1$

素因数の和:264

約数の個数: 64

約数和(自身を含む): 46033920

約数和(自身を除く): 26379400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 73, 106, 127, 146, 212, 254, 265, 292, 365, 424, 508, 530, 584, 635, 730, 1016, 1060, 1270, 1460, 2120, 2540, 2920, 3869, 5080, 6731, 7738, 9271, 13462, 15476, 18542, 19345, 26924, 30952, 33655, 37084, 38690, 46355, 53848, 67310, 74168, 77380, 92710, 134620, 154760, 185420, 269240, 370840, 491363, 982726, 1965452, 2456815, 3930904, 4913630, 9827260, 19654520]

約数ペア:

[(1, 19654520), (2, 9827260), (4, 4913630), (5, 3930904), (8, 2456815), (10, 1965452), (20, 982726), (40, 491363), (53, 370840), (73, 269240), (106, 185420), (127, 154760), (146, 134620), (212, 92710), (254, 77380), (265, 74168), (292, 67310), (365, 53848), (424, 46355), (508, 38690), (530, 37084), (584, 33655), (635, 30952), (730, 26924), (1016, 19345), (1060, 18542), (1270, 15476), (1460, 13462), (2120, 9271), (2540, 7738), (2920, 6731), (3869, 5080)]