20781488

素因数分解:

$2^4\times 7^2\times {\mathrm{13}}^1\times {\mathrm{2039}}^1$

素因数の和:2074

約数の個数: 60

約数和(自身を含む): 50465520

約数和(自身を除く): 29684032

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 49, 52, 56, 91, 98, 104, 112, 182, 196, 208, 364, 392, 637, 728, 784, 1274, 1456, 2039, 2548, 4078, 5096, 8156, 10192, 14273, 16312, 26507, 28546, 32624, 53014, 57092, 99911, 106028, 114184, 185549, 199822, 212056, 228368, 371098, 399644, 424112, 742196, 799288, 1298843, 1484392, 1598576, 2597686, 2968784, 5195372, 10390744, 20781488]

約数ペア:

[(1, 20781488), (2, 10390744), (4, 5195372), (7, 2968784), (8, 2597686), (13, 1598576), (14, 1484392), (16, 1298843), (26, 799288), (28, 742196), (49, 424112), (52, 399644), (56, 371098), (91, 228368), (98, 212056), (104, 199822), (112, 185549), (182, 114184), (196, 106028), (208, 99911), (364, 57092), (392, 53014), (637, 32624), (728, 28546), (784, 26507), (1274, 16312), (1456, 14273), (2039, 10192), (2548, 8156), (4078, 5096)]