81912420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{557}}^1$

素因数の和:634

約数の個数: 144

約数和(自身を含む): 268107840

約数和(自身を除く): 186195420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 36, 38, 43, 45, 57, 60, 76, 86, 90, 95, 114, 129, 171, 172, 180, 190, 215, 228, 258, 285, 342, 380, 387, 430, 516, 557, 570, 645, 684, 774, 817, 855, 860, 1114, 1140, 1290, 1548, 1634, 1671, 1710, 1935, 2228, 2451, 2580, 2785, 3268, 3342, 3420, 3870, 4085, 4902, 5013, 5570, 6684, 7353, 7740, 8170, 8355, 9804, 10026, 10583, 11140, 12255, 14706, 16340, 16710, 20052, 21166, 23951, 24510, 25065, 29412, 31749, 33420, 36765, 42332, 47902, 49020, 50130, 52915, 63498, 71853, 73530, 95247, 95804, 100260, 105830, 119755, 126996, 143706, 147060, 158745, 190494, 211660, 215559, 239510, 287412, 317490, 359265, 380988, 431118, 455069, 476235, 479020, 634980, 718530, 862236, 910138, 952470, 1077795, 1365207, 1437060, 1820276, 1904940, 2155590, 2275345, 2730414, 4095621, 4311180, 4550690, 5460828, 6826035, 8191242, 9101380, 13652070, 16382484, 20478105, 27304140, 40956210, 81912420]

約数ペア:

[(1, 81912420), (2, 40956210), (3, 27304140), (4, 20478105), (5, 16382484), (6, 13652070), (9, 9101380), (10, 8191242), (12, 6826035), (15, 5460828), (18, 4550690), (19, 4311180), (20, 4095621), (30, 2730414), (36, 2275345), (38, 2155590), (43, 1904940), (45, 1820276), (57, 1437060), (60, 1365207), (76, 1077795), (86, 952470), (90, 910138), (95, 862236), (114, 718530), (129, 634980), (171, 479020), (172, 476235), (180, 455069), (190, 431118), (215, 380988), (228, 359265), (258, 317490), (285, 287412), (342, 239510), (380, 215559), (387, 211660), (430, 190494), (516, 158745), (557, 147060), (570, 143706), (645, 126996), (684, 119755), (774, 105830), (817, 100260), (855, 95804), (860, 95247), (1114, 73530), (1140, 71853), (1290, 63498), (1548, 52915), (1634, 50130), (1671, 49020), (1710, 47902), (1935, 42332), (2228, 36765), (2451, 33420), (2580, 31749), (2785, 29412), (3268, 25065), (3342, 24510), (3420, 23951), (3870, 21166), (4085, 20052), (4902, 16710), (5013, 16340), (5570, 14706), (6684, 12255), (7353, 11140), (7740, 10583), (8170, 10026), (8355, 9804)]