21777888820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{298409}}^1$

素因数の和:298548

約数の個数: 48

約数和(自身を含む): 47375571600

約数和(自身を除く): 25597682780

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 89, 164, 178, 205, 356, 410, 445, 820, 890, 1780, 3649, 7298, 14596, 18245, 36490, 72980, 298409, 596818, 1193636, 1492045, 2984090, 5968180, 12234769, 24469538, 26558401, 48939076, 53116802, 61173845, 106233604, 122347690, 132792005, 244695380, 265584010, 531168020, 1088894441, 2177788882, 4355577764, 5444472205, 10888944410, 21777888820]

約数ペア:

[(1, 21777888820), (2, 10888944410), (4, 5444472205), (5, 4355577764), (10, 2177788882), (20, 1088894441), (41, 531168020), (82, 265584010), (89, 244695380), (164, 132792005), (178, 122347690), (205, 106233604), (356, 61173845), (410, 53116802), (445, 48939076), (820, 26558401), (890, 24469538), (1780, 12234769), (3649, 5968180), (7298, 2984090), (14596, 1492045), (18245, 1193636), (36490, 596818), (72980, 298409)]