19998843856

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{299671}}^1$

素因数の和:299819

約数の個数: 40

約数和(自身を含む): 40057755584

約数和(自身を除く): 20058911728

約数列:

[1, 2, 4, 8, 16, 43, 86, 97, 172, 194, 344, 388, 688, 776, 1552, 4171, 8342, 16684, 33368, 66736, 299671, 599342, 1198684, 2397368, 4794736, 12885853, 25771706, 29068087, 51543412, 58136174, 103086824, 116272348, 206173648, 232544696, 465089392, 1249927741, 2499855482, 4999710964, 9999421928, 19998843856]

約数ペア:

[(1, 19998843856), (2, 9999421928), (4, 4999710964), (8, 2499855482), (16, 1249927741), (43, 465089392), (86, 232544696), (97, 206173648), (172, 116272348), (194, 103086824), (344, 58136174), (388, 51543412), (688, 29068087), (776, 25771706), (1552, 12885853), (4171, 4794736), (8342, 2397368), (16684, 1198684), (33368, 599342), (66736, 299671)]