81407640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{149}}^1\times {\mathrm{157}}^1$

素因数の和:349

約数の個数: 128

約数和(自身を含む): 255960000

約数和(自身を除く): 174552360

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 29, 30, 40, 58, 60, 87, 116, 120, 145, 149, 157, 174, 232, 290, 298, 314, 348, 435, 447, 471, 580, 596, 628, 696, 745, 785, 870, 894, 942, 1160, 1192, 1256, 1490, 1570, 1740, 1788, 1884, 2235, 2355, 2980, 3140, 3480, 3576, 3768, 4321, 4470, 4553, 4710, 5960, 6280, 8642, 8940, 9106, 9420, 12963, 13659, 17284, 17880, 18212, 18840, 21605, 22765, 23393, 25926, 27318, 34568, 36424, 43210, 45530, 46786, 51852, 54636, 64815, 68295, 70179, 86420, 91060, 93572, 103704, 109272, 116965, 129630, 136590, 140358, 172840, 182120, 187144, 233930, 259260, 273180, 280716, 350895, 467860, 518520, 546360, 561432, 678397, 701790, 935720, 1356794, 1403580, 2035191, 2713588, 2807160, 3391985, 4070382, 5427176, 6783970, 8140764, 10175955, 13567940, 16281528, 20351910, 27135880, 40703820, 81407640]

約数ペア:

[(1, 81407640), (2, 40703820), (3, 27135880), (4, 20351910), (5, 16281528), (6, 13567940), (8, 10175955), (10, 8140764), (12, 6783970), (15, 5427176), (20, 4070382), (24, 3391985), (29, 2807160), (30, 2713588), (40, 2035191), (58, 1403580), (60, 1356794), (87, 935720), (116, 701790), (120, 678397), (145, 561432), (149, 546360), (157, 518520), (174, 467860), (232, 350895), (290, 280716), (298, 273180), (314, 259260), (348, 233930), (435, 187144), (447, 182120), (471, 172840), (580, 140358), (596, 136590), (628, 129630), (696, 116965), (745, 109272), (785, 103704), (870, 93572), (894, 91060), (942, 86420), (1160, 70179), (1192, 68295), (1256, 64815), (1490, 54636), (1570, 51852), (1740, 46786), (1788, 45530), (1884, 43210), (2235, 36424), (2355, 34568), (2980, 27318), (3140, 25926), (3480, 23393), (3576, 22765), (3768, 21605), (4321, 18840), (4470, 18212), (4553, 17880), (4710, 17284), (5960, 13659), (6280, 12963), (8642, 9420), (8940, 9106)]