156621940

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{641}}^1\times {\mathrm{643}}^1$

素因数の和:1312

約数の個数: 48

約数和(自身を含む): 347296320

約数和(自身を除く): 190674380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 641, 643, 1282, 1286, 2564, 2572, 3205, 3215, 6410, 6430, 12179, 12217, 12820, 12860, 24358, 24434, 48716, 48868, 60895, 61085, 121790, 122170, 243580, 244340, 412163, 824326, 1648652, 2060815, 4121630, 7831097, 8243260, 15662194, 31324388, 39155485, 78310970, 156621940]

約数ペア:

[(1, 156621940), (2, 78310970), (4, 39155485), (5, 31324388), (10, 15662194), (19, 8243260), (20, 7831097), (38, 4121630), (76, 2060815), (95, 1648652), (190, 824326), (380, 412163), (641, 244340), (643, 243580), (1282, 122170), (1286, 121790), (2564, 61085), (2572, 60895), (3205, 48868), (3215, 48716), (6410, 24434), (6430, 24358), (12179, 12860), (12217, 12820)]