87780980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{491}}^1\times {\mathrm{1277}}^1$

素因数の和:1784

約数の個数: 48

約数和(自身を含む): 211268736

約数和(自身を除く): 123487756

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 491, 982, 1277, 1964, 2455, 2554, 3437, 4910, 5108, 6385, 6874, 8939, 9820, 12770, 13748, 17185, 17878, 25540, 34370, 35756, 44695, 68740, 89390, 178780, 627007, 1254014, 2508028, 3135035, 4389049, 6270070, 8778098, 12540140, 17556196, 21945245, 43890490, 87780980]

約数ペア:

[(1, 87780980), (2, 43890490), (4, 21945245), (5, 17556196), (7, 12540140), (10, 8778098), (14, 6270070), (20, 4389049), (28, 3135035), (35, 2508028), (70, 1254014), (140, 627007), (491, 178780), (982, 89390), (1277, 68740), (1964, 44695), (2455, 35756), (2554, 34370), (3437, 25540), (4910, 17878), (5108, 17185), (6385, 13748), (6874, 12770), (8939, 9820)]