20816128

素因数分解:

$2^8\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:151

約数の個数: 72

約数和(自身を含む): 44608256

約数和(自身を除く): 23792128

約数列:

[1, 2, 4, 8, 16, 31, 32, 43, 61, 62, 64, 86, 122, 124, 128, 172, 244, 248, 256, 344, 488, 496, 688, 976, 992, 1333, 1376, 1891, 1952, 1984, 2623, 2666, 2752, 3782, 3904, 3968, 5246, 5332, 5504, 7564, 7808, 7936, 10492, 10664, 11008, 15128, 15616, 20984, 21328, 30256, 41968, 42656, 60512, 81313, 83936, 85312, 121024, 162626, 167872, 170624, 242048, 325252, 335744, 341248, 484096, 650504, 671488, 1301008, 2602016, 5204032, 10408064, 20816128]

約数ペア:

[(1, 20816128), (2, 10408064), (4, 5204032), (8, 2602016), (16, 1301008), (31, 671488), (32, 650504), (43, 484096), (61, 341248), (62, 335744), (64, 325252), (86, 242048), (122, 170624), (124, 167872), (128, 162626), (172, 121024), (244, 85312), (248, 83936), (256, 81313), (344, 60512), (488, 42656), (496, 41968), (688, 30256), (976, 21328), (992, 20984), (1333, 15616), (1376, 15128), (1891, 11008), (1952, 10664), (1984, 10492), (2623, 7936), (2666, 7808), (2752, 7564), (3782, 5504), (3904, 5332), (3968, 5246)]