400631280

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{238471}}^1$

素因数の和:238494

約数の個数: 80

約数和(自身を含む): 1419385344

約数和(自身を除く): 1018754064

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 238471, 476942, 715413, 953884, 1192355, 1430826, 1669297, 1907768, 2384710, 2861652, 3338594, 3577065, 3815536, 4769420, 5007891, 5723304, 6677188, 7154130, 8346485, 9538840, 10015782, 11446608, 13354376, 14308260, 16692970, 19077680, 20031564, 25039455, 26708752, 28616520, 33385940, 40063128, 50078910, 57233040, 66771880, 80126256, 100157820, 133543760, 200315640, 400631280]

約数ペア:

[(1, 400631280), (2, 200315640), (3, 133543760), (4, 100157820), (5, 80126256), (6, 66771880), (7, 57233040), (8, 50078910), (10, 40063128), (12, 33385940), (14, 28616520), (15, 26708752), (16, 25039455), (20, 20031564), (21, 19077680), (24, 16692970), (28, 14308260), (30, 13354376), (35, 11446608), (40, 10015782), (42, 9538840), (48, 8346485), (56, 7154130), (60, 6677188), (70, 5723304), (80, 5007891), (84, 4769420), (105, 3815536), (112, 3577065), (120, 3338594), (140, 2861652), (168, 2384710), (210, 1907768), (240, 1669297), (280, 1430826), (336, 1192355), (420, 953884), (560, 715413), (840, 476942), (1680, 238471)]