21000270976

素因数分解:

$2^7\times {\mathrm{31}}^1\times {\mathrm{397}}^1\times {\mathrm{13331}}^1$

素因数の和:13773

約数の個数: 64

約数和(自身を含む): 43298069760

約数和(自身を除く): 22297798784

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 64, 124, 128, 248, 397, 496, 794, 992, 1588, 1984, 3176, 3968, 6352, 12307, 12704, 13331, 24614, 25408, 26662, 49228, 50816, 53324, 98456, 106648, 196912, 213296, 393824, 413261, 426592, 787648, 826522, 853184, 1575296, 1653044, 1706368, 3306088, 5292407, 6612176, 10584814, 13224352, 21169628, 26448704, 42339256, 52897408, 84678512, 164064617, 169357024, 328129234, 338714048, 656258468, 677428096, 1312516936, 2625033872, 5250067744, 10500135488, 21000270976]

約数ペア:

[(1, 21000270976), (2, 10500135488), (4, 5250067744), (8, 2625033872), (16, 1312516936), (31, 677428096), (32, 656258468), (62, 338714048), (64, 328129234), (124, 169357024), (128, 164064617), (248, 84678512), (397, 52897408), (496, 42339256), (794, 26448704), (992, 21169628), (1588, 13224352), (1984, 10584814), (3176, 6612176), (3968, 5292407), (6352, 3306088), (12307, 1706368), (12704, 1653044), (13331, 1575296), (24614, 853184), (25408, 826522), (26662, 787648), (49228, 426592), (50816, 413261), (53324, 393824), (98456, 213296), (106648, 196912)]