20402960

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{433}}^1$

素因数の和:496

約数の個数: 80

約数和(自身を含む): 51663360

約数和(自身を除く): 31260400

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 31, 38, 40, 62, 76, 80, 95, 124, 152, 155, 190, 248, 304, 310, 380, 433, 496, 589, 620, 760, 866, 1178, 1240, 1520, 1732, 2165, 2356, 2480, 2945, 3464, 4330, 4712, 5890, 6928, 8227, 8660, 9424, 11780, 13423, 16454, 17320, 23560, 26846, 32908, 34640, 41135, 47120, 53692, 65816, 67115, 82270, 107384, 131632, 134230, 164540, 214768, 255037, 268460, 329080, 510074, 536920, 658160, 1020148, 1073840, 1275185, 2040296, 2550370, 4080592, 5100740, 10201480, 20402960]

約数ペア:

[(1, 20402960), (2, 10201480), (4, 5100740), (5, 4080592), (8, 2550370), (10, 2040296), (16, 1275185), (19, 1073840), (20, 1020148), (31, 658160), (38, 536920), (40, 510074), (62, 329080), (76, 268460), (80, 255037), (95, 214768), (124, 164540), (152, 134230), (155, 131632), (190, 107384), (248, 82270), (304, 67115), (310, 65816), (380, 53692), (433, 47120), (496, 41135), (589, 34640), (620, 32908), (760, 26846), (866, 23560), (1178, 17320), (1240, 16454), (1520, 13423), (1732, 11780), (2165, 9424), (2356, 8660), (2480, 8227), (2945, 6928), (3464, 5890), (4330, 4712)]