20663872

素因数分解:

$2^6\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1$

素因数の和:219

約数の個数: 56

約数和(自身を含む): 42834560

約数和(自身を除く): 22170688

約数列:

[1, 2, 4, 8, 16, 32, 61, 64, 67, 79, 122, 134, 158, 244, 268, 316, 488, 536, 632, 976, 1072, 1264, 1952, 2144, 2528, 3904, 4087, 4288, 4819, 5056, 5293, 8174, 9638, 10586, 16348, 19276, 21172, 32696, 38552, 42344, 65392, 77104, 84688, 130784, 154208, 169376, 261568, 308416, 322873, 338752, 645746, 1291492, 2582984, 5165968, 10331936, 20663872]

約数ペア:

[(1, 20663872), (2, 10331936), (4, 5165968), (8, 2582984), (16, 1291492), (32, 645746), (61, 338752), (64, 322873), (67, 308416), (79, 261568), (122, 169376), (134, 154208), (158, 130784), (244, 84688), (268, 77104), (316, 65392), (488, 42344), (536, 38552), (632, 32696), (976, 21172), (1072, 19276), (1264, 16348), (1952, 10586), (2144, 9638), (2528, 8174), (3904, 5293), (4087, 5056), (4288, 4819)]