140678020

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{20507}}^1$

素因数の和:20537

約数の個数: 48

約数和(自身を含む): 344534400

約数和(自身を除く): 203856380

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 343, 490, 686, 980, 1372, 1715, 3430, 6860, 20507, 41014, 82028, 102535, 143549, 205070, 287098, 410140, 574196, 717745, 1004843, 1435490, 2009686, 2870980, 4019372, 5024215, 7033901, 10048430, 14067802, 20096860, 28135604, 35169505, 70339010, 140678020]

約数ペア:

[(1, 140678020), (2, 70339010), (4, 35169505), (5, 28135604), (7, 20096860), (10, 14067802), (14, 10048430), (20, 7033901), (28, 5024215), (35, 4019372), (49, 2870980), (70, 2009686), (98, 1435490), (140, 1004843), (196, 717745), (245, 574196), (343, 410140), (490, 287098), (686, 205070), (980, 143549), (1372, 102535), (1715, 82028), (3430, 41014), (6860, 20507)]