840140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{353}}^1$

素因数の和:386

約数の個数: 48

約数和(自身を含む): 2140992

約数和(自身を除く): 1300852

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 68, 70, 85, 119, 140, 170, 238, 340, 353, 476, 595, 706, 1190, 1412, 1765, 2380, 2471, 3530, 4942, 6001, 7060, 9884, 12002, 12355, 24004, 24710, 30005, 42007, 49420, 60010, 84014, 120020, 168028, 210035, 420070, 840140]

約数ペア:

[(1, 840140), (2, 420070), (4, 210035), (5, 168028), (7, 120020), (10, 84014), (14, 60010), (17, 49420), (20, 42007), (28, 30005), (34, 24710), (35, 24004), (68, 12355), (70, 12002), (85, 9884), (119, 7060), (140, 6001), (170, 4942), (238, 3530), (340, 2471), (353, 2380), (476, 1765), (595, 1412), (706, 1190)]