21145728

素因数分解:

$2^7\times 3^1\times {\mathrm{53}}^1\times {\mathrm{1039}}^1$

素因数の和:1109

約数の個数: 64

約数和(自身を含む): 57283200

約数和(自身を除く): 36137472

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 53, 64, 96, 106, 128, 159, 192, 212, 318, 384, 424, 636, 848, 1039, 1272, 1696, 2078, 2544, 3117, 3392, 4156, 5088, 6234, 6784, 8312, 10176, 12468, 16624, 20352, 24936, 33248, 49872, 55067, 66496, 99744, 110134, 132992, 165201, 199488, 220268, 330402, 398976, 440536, 660804, 881072, 1321608, 1762144, 2643216, 3524288, 5286432, 7048576, 10572864, 21145728]

約数ペア:

[(1, 21145728), (2, 10572864), (3, 7048576), (4, 5286432), (6, 3524288), (8, 2643216), (12, 1762144), (16, 1321608), (24, 881072), (32, 660804), (48, 440536), (53, 398976), (64, 330402), (96, 220268), (106, 199488), (128, 165201), (159, 132992), (192, 110134), (212, 99744), (318, 66496), (384, 55067), (424, 49872), (636, 33248), (848, 24936), (1039, 20352), (1272, 16624), (1696, 12468), (2078, 10176), (2544, 8312), (3117, 6784), (3392, 6234), (4156, 5088)]