81631980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23869}}^1$

素因数の和:23903

約数の個数: 72

約数和(自身を含む): 260660400

約数和(自身を除く): 179028420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 36, 38, 45, 57, 60, 76, 90, 95, 114, 171, 180, 190, 228, 285, 342, 380, 570, 684, 855, 1140, 1710, 3420, 23869, 47738, 71607, 95476, 119345, 143214, 214821, 238690, 286428, 358035, 429642, 453511, 477380, 716070, 859284, 907022, 1074105, 1360533, 1432140, 1814044, 2148210, 2267555, 2721066, 4081599, 4296420, 4535110, 5442132, 6802665, 8163198, 9070220, 13605330, 16326396, 20407995, 27210660, 40815990, 81631980]

約数ペア:

[(1, 81631980), (2, 40815990), (3, 27210660), (4, 20407995), (5, 16326396), (6, 13605330), (9, 9070220), (10, 8163198), (12, 6802665), (15, 5442132), (18, 4535110), (19, 4296420), (20, 4081599), (30, 2721066), (36, 2267555), (38, 2148210), (45, 1814044), (57, 1432140), (60, 1360533), (76, 1074105), (90, 907022), (95, 859284), (114, 716070), (171, 477380), (180, 453511), (190, 429642), (228, 358035), (285, 286428), (342, 238690), (380, 214821), (570, 143214), (684, 119345), (855, 95476), (1140, 71607), (1710, 47738), (3420, 23869)]