19992940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{4783}}^1$

素因数の和:4822

約数の個数: 48

約数和(自身を含む): 48222720

約数和(自身を除く): 28229780

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 2090, 4180, 4783, 9566, 19132, 23915, 47830, 52613, 90877, 95660, 105226, 181754, 210452, 263065, 363508, 454385, 526130, 908770, 999647, 1052260, 1817540, 1999294, 3998588, 4998235, 9996470, 19992940]

約数ペア:

[(1, 19992940), (2, 9996470), (4, 4998235), (5, 3998588), (10, 1999294), (11, 1817540), (19, 1052260), (20, 999647), (22, 908770), (38, 526130), (44, 454385), (55, 363508), (76, 263065), (95, 210452), (110, 181754), (190, 105226), (209, 95660), (220, 90877), (380, 52613), (418, 47830), (836, 23915), (1045, 19132), (2090, 9566), (4180, 4783)]