81611840

素因数分解:

$2^6\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{433}}^1$

素因数の和:500

約数の個数: 112

約数和(自身を含む): 211653120

約数和(自身を除く): 130041280

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 31, 32, 38, 40, 62, 64, 76, 80, 95, 124, 152, 155, 160, 190, 248, 304, 310, 320, 380, 433, 496, 589, 608, 620, 760, 866, 992, 1178, 1216, 1240, 1520, 1732, 1984, 2165, 2356, 2480, 2945, 3040, 3464, 4330, 4712, 4960, 5890, 6080, 6928, 8227, 8660, 9424, 9920, 11780, 13423, 13856, 16454, 17320, 18848, 23560, 26846, 27712, 32908, 34640, 37696, 41135, 47120, 53692, 65816, 67115, 69280, 82270, 94240, 107384, 131632, 134230, 138560, 164540, 188480, 214768, 255037, 263264, 268460, 329080, 429536, 510074, 526528, 536920, 658160, 859072, 1020148, 1073840, 1275185, 1316320, 2040296, 2147680, 2550370, 2632640, 4080592, 4295360, 5100740, 8161184, 10201480, 16322368, 20402960, 40805920, 81611840]

約数ペア:

[(1, 81611840), (2, 40805920), (4, 20402960), (5, 16322368), (8, 10201480), (10, 8161184), (16, 5100740), (19, 4295360), (20, 4080592), (31, 2632640), (32, 2550370), (38, 2147680), (40, 2040296), (62, 1316320), (64, 1275185), (76, 1073840), (80, 1020148), (95, 859072), (124, 658160), (152, 536920), (155, 526528), (160, 510074), (190, 429536), (248, 329080), (304, 268460), (310, 263264), (320, 255037), (380, 214768), (433, 188480), (496, 164540), (589, 138560), (608, 134230), (620, 131632), (760, 107384), (866, 94240), (992, 82270), (1178, 69280), (1216, 67115), (1240, 65816), (1520, 53692), (1732, 47120), (1984, 41135), (2165, 37696), (2356, 34640), (2480, 32908), (2945, 27712), (3040, 26846), (3464, 23560), (4330, 18848), (4712, 17320), (4960, 16454), (5890, 13856), (6080, 13423), (6928, 11780), (8227, 9920), (8660, 9424)]