8206940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^2\times {\mathrm{61}}^1$

素因数の和:139

約数の個数: 72

約数和(自身を含む): 20686176

約数和(自身を除く): 12479236

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 61, 62, 70, 122, 124, 140, 155, 217, 244, 305, 310, 427, 434, 610, 620, 854, 868, 961, 1085, 1220, 1708, 1891, 1922, 2135, 2170, 3782, 3844, 4270, 4340, 4805, 6727, 7564, 8540, 9455, 9610, 13237, 13454, 18910, 19220, 26474, 26908, 33635, 37820, 52948, 58621, 66185, 67270, 117242, 132370, 134540, 234484, 264740, 293105, 410347, 586210, 820694, 1172420, 1641388, 2051735, 4103470, 8206940]

約数ペア:

[(1, 8206940), (2, 4103470), (4, 2051735), (5, 1641388), (7, 1172420), (10, 820694), (14, 586210), (20, 410347), (28, 293105), (31, 264740), (35, 234484), (61, 134540), (62, 132370), (70, 117242), (122, 67270), (124, 66185), (140, 58621), (155, 52948), (217, 37820), (244, 33635), (305, 26908), (310, 26474), (427, 19220), (434, 18910), (610, 13454), (620, 13237), (854, 9610), (868, 9455), (961, 8540), (1085, 7564), (1220, 6727), (1708, 4805), (1891, 4340), (1922, 4270), (2135, 3844), (2170, 3782)]