21154528

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{1051}}^1$

素因数の和:1115

約数の個数: 48

約数和(自身を含む): 45332784

約数和(自身を除く): 24178256

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 37, 68, 74, 136, 148, 272, 296, 544, 592, 629, 1051, 1184, 1258, 2102, 2516, 4204, 5032, 8408, 10064, 16816, 17867, 20128, 33632, 35734, 38887, 71468, 77774, 142936, 155548, 285872, 311096, 571744, 622192, 661079, 1244384, 1322158, 2644316, 5288632, 10577264, 21154528]

約数ペア:

[(1, 21154528), (2, 10577264), (4, 5288632), (8, 2644316), (16, 1322158), (17, 1244384), (32, 661079), (34, 622192), (37, 571744), (68, 311096), (74, 285872), (136, 155548), (148, 142936), (272, 77774), (296, 71468), (544, 38887), (592, 35734), (629, 33632), (1051, 20128), (1184, 17867), (1258, 16816), (2102, 10064), (2516, 8408), (4204, 5032)]