20493728

素因数分解:

$2^5\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{283}}^1$

素因数の和:397

約数の個数: 48

約数和(自身を含む): 42368256

約数和(自身を除く): 21874528

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 73, 124, 146, 248, 283, 292, 496, 566, 584, 992, 1132, 1168, 2263, 2264, 2336, 4526, 4528, 8773, 9052, 9056, 17546, 18104, 20659, 35092, 36208, 41318, 70184, 72416, 82636, 140368, 165272, 280736, 330544, 640429, 661088, 1280858, 2561716, 5123432, 10246864, 20493728]

約数ペア:

[(1, 20493728), (2, 10246864), (4, 5123432), (8, 2561716), (16, 1280858), (31, 661088), (32, 640429), (62, 330544), (73, 280736), (124, 165272), (146, 140368), (248, 82636), (283, 72416), (292, 70184), (496, 41318), (566, 36208), (584, 35092), (992, 20659), (1132, 18104), (1168, 17546), (2263, 9056), (2264, 9052), (2336, 8773), (4526, 4528)]