688940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1$

素因数の和:79

約数の個数: 72

約数和(自身を含む): 1819440

約数和(自身を除く): 1130500

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 37, 38, 49, 70, 74, 76, 95, 98, 133, 140, 148, 185, 190, 196, 245, 259, 266, 370, 380, 490, 518, 532, 665, 703, 740, 931, 980, 1036, 1295, 1330, 1406, 1813, 1862, 2590, 2660, 2812, 3515, 3626, 3724, 4655, 4921, 5180, 7030, 7252, 9065, 9310, 9842, 14060, 18130, 18620, 19684, 24605, 34447, 36260, 49210, 68894, 98420, 137788, 172235, 344470, 688940]

約数ペア:

[(1, 688940), (2, 344470), (4, 172235), (5, 137788), (7, 98420), (10, 68894), (14, 49210), (19, 36260), (20, 34447), (28, 24605), (35, 19684), (37, 18620), (38, 18130), (49, 14060), (70, 9842), (74, 9310), (76, 9065), (95, 7252), (98, 7030), (133, 5180), (140, 4921), (148, 4655), (185, 3724), (190, 3626), (196, 3515), (245, 2812), (259, 2660), (266, 2590), (370, 1862), (380, 1813), (490, 1406), (518, 1330), (532, 1295), (665, 1036), (703, 980), (740, 931)]